chore: Update discovery artifacts (#1438)

## Deleted keys were detected in the following stable discovery artifacts:
youtube v3 https://github.com/googleapis/google-api-python-client/commit/ec21dff96d9538ad6c7f9b318eca88178533aa95

## Deleted keys were detected in the following pre-stable discovery artifacts:
firebasehosting v1beta1 https://github.com/googleapis/google-api-python-client/commit/c83ac386b65f82e7ba29851d56b496b09a29cf98

## Discovery Artifact Change Summary:
feat(analyticsadmin): update the api https://github.com/googleapis/google-api-python-client/commit/96675a8d9158ec13353fe241f858201fc51b784d
feat(composer): update the api https://github.com/googleapis/google-api-python-client/commit/add2fbdc3afb6696537eb087bc1d79df9194a37a
feat(container): update the api https://github.com/googleapis/google-api-python-client/commit/f8fae98db6d1943411b1a6c0f5a65dea336569f6
feat(content): update the api https://github.com/googleapis/google-api-python-client/commit/0814e009a4a11800db5b4afd7b6260e504c98047
feat(datacatalog): update the api https://github.com/googleapis/google-api-python-client/commit/99706059e58bb3d616253a1af2cd162b5a0b0279
feat(dataflow): update the api https://github.com/googleapis/google-api-python-client/commit/d5f09ef30392532bcfdd82901148bdd3ac6eec01
feat(docs): update the api https://github.com/googleapis/google-api-python-client/commit/dc66f4cafba86baff6149b2f6e59ae1888006911
feat(file): update the api https://github.com/googleapis/google-api-python-client/commit/523fc5c900f53489d56400deb650f6586c9681a0
feat(firebasehosting): update the api https://github.com/googleapis/google-api-python-client/commit/c83ac386b65f82e7ba29851d56b496b09a29cf98
feat(healthcare): update the api https://github.com/googleapis/google-api-python-client/commit/a407471b14349b8c08018196041568f2a35f8d4f
feat(ideahub): update the api https://github.com/googleapis/google-api-python-client/commit/c6b0d83940f238b1330896240492e8db397dcd15
fix(keep): update the api https://github.com/googleapis/google-api-python-client/commit/08fee732e96d3220e624c8fca7b8a9b0c0bcb146
feat(managedidentities): update the api https://github.com/googleapis/google-api-python-client/commit/863b333da7848029fd1614fd48b46cfbe12afcd5
feat(memcache): update the api https://github.com/googleapis/google-api-python-client/commit/17dc001e4649f54944066ce153e3c552c850a146
feat(metastore): update the api https://github.com/googleapis/google-api-python-client/commit/f3a76c9359babc48cc0b76ce7e3be0711ba028ae
feat(slides): update the api https://github.com/googleapis/google-api-python-client/commit/314d61b9ef8c5c30f9756462504dc0df92284cb2
feat(sqladmin): update the api https://github.com/googleapis/google-api-python-client/commit/62784e0b1b5752b480afe1ddd77dcf412bb35dbb
feat(tpu): update the api https://github.com/googleapis/google-api-python-client/commit/16bf712cca4a393d96e4135de3d02e5005051b6d
feat(youtube): update the api https://github.com/googleapis/google-api-python-client/commit/ec21dff96d9538ad6c7f9b318eca88178533aa95
diff --git a/docs/dyn/gkehub_v1beta.projects.locations.features.html b/docs/dyn/gkehub_v1beta.projects.locations.features.html
index cb55d2d..0e5e60d 100644
--- a/docs/dyn/gkehub_v1beta.projects.locations.features.html
+++ b/docs/dyn/gkehub_v1beta.projects.locations.features.html
@@ -125,7 +125,7 @@
   "labels": { # GCP labels for this Feature.
     "a_key": "A String",
   },
-  "membershipSpecs": { # Optional. Membership-specific configuration for this Feature. If this Feature does not support any per-Membership configuration, this field may be unused. The keys indicate which Membership the configuration is for, in the form: projects/{p}/locations/{l}/memberships/{m} Where {p} is the project, {l} is a valid location and {m} is a valid Membership in this project at that location. {p} WILL match the Feature's project. {p} will always be returned as the project number, but the project ID is also accepted during input. If the same Membership is specified in the map twice (using the project ID form, and the project number form), exactly ONE of the entries will be saved, with no guarantees as to which. For this reason, it is recommended the same format be used for all entries when mutating a Feature.
+  "membershipSpecs": { # Optional. Membership-specific configuration for this Feature. If this Feature does not support any per-Membership configuration, this field may be unused. The keys indicate which Membership the configuration is for, in the form: `projects/{p}/locations/{l}/memberships/{m}` Where {p} is the project, {l} is a valid location and {m} is a valid Membership in this project at that location. {p} WILL match the Feature's project. {p} will always be returned as the project number, but the project ID is also accepted during input. If the same Membership is specified in the map twice (using the project ID form, and the project number form), exactly ONE of the entries will be saved, with no guarantees as to which. For this reason, it is recommended the same format be used for all entries when mutating a Feature.
     "a_key": { # MembershipFeatureSpec contains configuration information for a single Membership.
       "configmanagement": { # **Anthos Config Management**: Configuration for a single cluster. Intended to parallel the ConfigManagement CR. # Config Management-specific spec.
         "binauthz": { # Configuration for Binauthz # Binauthz conifguration for the cluster.
@@ -163,7 +163,7 @@
       },
     },
   },
-  "membershipStates": { # Output only. Membership-specific Feature status. If this Feature does report any per-Membership status, this field may be unused. The keys indicate which Membership the state is for, in the form: projects/{p}/locations/{l}/memberships/{m} Where {p} is the project number, {l} is a valid location and {m} is a valid Membership in this project at that location. {p} MUST match the Feature's project number.
+  "membershipStates": { # Output only. Membership-specific Feature status. If this Feature does report any per-Membership status, this field may be unused. The keys indicate which Membership the state is for, in the form: `projects/{p}/locations/{l}/memberships/{m}` Where {p} is the project number, {l} is a valid location and {m} is a valid Membership in this project at that location. {p} MUST match the Feature's project number.
     "a_key": { # MembershipFeatureState contains Feature status information for a single Membership.
       "configmanagement": { # **Anthos Config Management**: State for a single cluster. # Config Management-specific state.
         "binauthzState": { # State for Binauthz # Binauthz status
@@ -297,7 +297,7 @@
   },
   "spec": { # CommonFeatureSpec contains Hub-wide configuration information # Optional. Hub-wide Feature configuration. If this Feature does not support any Hub-wide configuration, this field may be unused.
     "multiclusteringress": { # **Multi-cluster Ingress**: The configuration for the MultiClusterIngress feature. # Multicluster Ingress-specific spec.
-      "billing": "A String", # Customer's billing structure
+      "billing": "A String", # Deprecated: This field will be ignored and should not be set. Customer's billing structure.
       "configMembership": "A String", # Fully-qualified Membership name which hosts the MultiClusterIngress CRD. Example: `projects/foo-proj/locations/global/memberships/bar`
     },
   },
@@ -399,7 +399,7 @@
   "labels": { # GCP labels for this Feature.
     "a_key": "A String",
   },
-  "membershipSpecs": { # Optional. Membership-specific configuration for this Feature. If this Feature does not support any per-Membership configuration, this field may be unused. The keys indicate which Membership the configuration is for, in the form: projects/{p}/locations/{l}/memberships/{m} Where {p} is the project, {l} is a valid location and {m} is a valid Membership in this project at that location. {p} WILL match the Feature's project. {p} will always be returned as the project number, but the project ID is also accepted during input. If the same Membership is specified in the map twice (using the project ID form, and the project number form), exactly ONE of the entries will be saved, with no guarantees as to which. For this reason, it is recommended the same format be used for all entries when mutating a Feature.
+  "membershipSpecs": { # Optional. Membership-specific configuration for this Feature. If this Feature does not support any per-Membership configuration, this field may be unused. The keys indicate which Membership the configuration is for, in the form: `projects/{p}/locations/{l}/memberships/{m}` Where {p} is the project, {l} is a valid location and {m} is a valid Membership in this project at that location. {p} WILL match the Feature's project. {p} will always be returned as the project number, but the project ID is also accepted during input. If the same Membership is specified in the map twice (using the project ID form, and the project number form), exactly ONE of the entries will be saved, with no guarantees as to which. For this reason, it is recommended the same format be used for all entries when mutating a Feature.
     "a_key": { # MembershipFeatureSpec contains configuration information for a single Membership.
       "configmanagement": { # **Anthos Config Management**: Configuration for a single cluster. Intended to parallel the ConfigManagement CR. # Config Management-specific spec.
         "binauthz": { # Configuration for Binauthz # Binauthz conifguration for the cluster.
@@ -437,7 +437,7 @@
       },
     },
   },
-  "membershipStates": { # Output only. Membership-specific Feature status. If this Feature does report any per-Membership status, this field may be unused. The keys indicate which Membership the state is for, in the form: projects/{p}/locations/{l}/memberships/{m} Where {p} is the project number, {l} is a valid location and {m} is a valid Membership in this project at that location. {p} MUST match the Feature's project number.
+  "membershipStates": { # Output only. Membership-specific Feature status. If this Feature does report any per-Membership status, this field may be unused. The keys indicate which Membership the state is for, in the form: `projects/{p}/locations/{l}/memberships/{m}` Where {p} is the project number, {l} is a valid location and {m} is a valid Membership in this project at that location. {p} MUST match the Feature's project number.
     "a_key": { # MembershipFeatureState contains Feature status information for a single Membership.
       "configmanagement": { # **Anthos Config Management**: State for a single cluster. # Config Management-specific state.
         "binauthzState": { # State for Binauthz # Binauthz status
@@ -571,7 +571,7 @@
   },
   "spec": { # CommonFeatureSpec contains Hub-wide configuration information # Optional. Hub-wide Feature configuration. If this Feature does not support any Hub-wide configuration, this field may be unused.
     "multiclusteringress": { # **Multi-cluster Ingress**: The configuration for the MultiClusterIngress feature. # Multicluster Ingress-specific spec.
-      "billing": "A String", # Customer's billing structure
+      "billing": "A String", # Deprecated: This field will be ignored and should not be set. Customer's billing structure.
       "configMembership": "A String", # Fully-qualified Membership name which hosts the MultiClusterIngress CRD. Example: `projects/foo-proj/locations/global/memberships/bar`
     },
   },
@@ -661,7 +661,7 @@
       "labels": { # GCP labels for this Feature.
         "a_key": "A String",
       },
-      "membershipSpecs": { # Optional. Membership-specific configuration for this Feature. If this Feature does not support any per-Membership configuration, this field may be unused. The keys indicate which Membership the configuration is for, in the form: projects/{p}/locations/{l}/memberships/{m} Where {p} is the project, {l} is a valid location and {m} is a valid Membership in this project at that location. {p} WILL match the Feature's project. {p} will always be returned as the project number, but the project ID is also accepted during input. If the same Membership is specified in the map twice (using the project ID form, and the project number form), exactly ONE of the entries will be saved, with no guarantees as to which. For this reason, it is recommended the same format be used for all entries when mutating a Feature.
+      "membershipSpecs": { # Optional. Membership-specific configuration for this Feature. If this Feature does not support any per-Membership configuration, this field may be unused. The keys indicate which Membership the configuration is for, in the form: `projects/{p}/locations/{l}/memberships/{m}` Where {p} is the project, {l} is a valid location and {m} is a valid Membership in this project at that location. {p} WILL match the Feature's project. {p} will always be returned as the project number, but the project ID is also accepted during input. If the same Membership is specified in the map twice (using the project ID form, and the project number form), exactly ONE of the entries will be saved, with no guarantees as to which. For this reason, it is recommended the same format be used for all entries when mutating a Feature.
         "a_key": { # MembershipFeatureSpec contains configuration information for a single Membership.
           "configmanagement": { # **Anthos Config Management**: Configuration for a single cluster. Intended to parallel the ConfigManagement CR. # Config Management-specific spec.
             "binauthz": { # Configuration for Binauthz # Binauthz conifguration for the cluster.
@@ -699,7 +699,7 @@
           },
         },
       },
-      "membershipStates": { # Output only. Membership-specific Feature status. If this Feature does report any per-Membership status, this field may be unused. The keys indicate which Membership the state is for, in the form: projects/{p}/locations/{l}/memberships/{m} Where {p} is the project number, {l} is a valid location and {m} is a valid Membership in this project at that location. {p} MUST match the Feature's project number.
+      "membershipStates": { # Output only. Membership-specific Feature status. If this Feature does report any per-Membership status, this field may be unused. The keys indicate which Membership the state is for, in the form: `projects/{p}/locations/{l}/memberships/{m}` Where {p} is the project number, {l} is a valid location and {m} is a valid Membership in this project at that location. {p} MUST match the Feature's project number.
         "a_key": { # MembershipFeatureState contains Feature status information for a single Membership.
           "configmanagement": { # **Anthos Config Management**: State for a single cluster. # Config Management-specific state.
             "binauthzState": { # State for Binauthz # Binauthz status
@@ -833,7 +833,7 @@
       },
       "spec": { # CommonFeatureSpec contains Hub-wide configuration information # Optional. Hub-wide Feature configuration. If this Feature does not support any Hub-wide configuration, this field may be unused.
         "multiclusteringress": { # **Multi-cluster Ingress**: The configuration for the MultiClusterIngress feature. # Multicluster Ingress-specific spec.
-          "billing": "A String", # Customer's billing structure
+          "billing": "A String", # Deprecated: This field will be ignored and should not be set. Customer's billing structure.
           "configMembership": "A String", # Fully-qualified Membership name which hosts the MultiClusterIngress CRD. Example: `projects/foo-proj/locations/global/memberships/bar`
         },
       },
@@ -879,7 +879,7 @@
   "labels": { # GCP labels for this Feature.
     "a_key": "A String",
   },
-  "membershipSpecs": { # Optional. Membership-specific configuration for this Feature. If this Feature does not support any per-Membership configuration, this field may be unused. The keys indicate which Membership the configuration is for, in the form: projects/{p}/locations/{l}/memberships/{m} Where {p} is the project, {l} is a valid location and {m} is a valid Membership in this project at that location. {p} WILL match the Feature's project. {p} will always be returned as the project number, but the project ID is also accepted during input. If the same Membership is specified in the map twice (using the project ID form, and the project number form), exactly ONE of the entries will be saved, with no guarantees as to which. For this reason, it is recommended the same format be used for all entries when mutating a Feature.
+  "membershipSpecs": { # Optional. Membership-specific configuration for this Feature. If this Feature does not support any per-Membership configuration, this field may be unused. The keys indicate which Membership the configuration is for, in the form: `projects/{p}/locations/{l}/memberships/{m}` Where {p} is the project, {l} is a valid location and {m} is a valid Membership in this project at that location. {p} WILL match the Feature's project. {p} will always be returned as the project number, but the project ID is also accepted during input. If the same Membership is specified in the map twice (using the project ID form, and the project number form), exactly ONE of the entries will be saved, with no guarantees as to which. For this reason, it is recommended the same format be used for all entries when mutating a Feature.
     "a_key": { # MembershipFeatureSpec contains configuration information for a single Membership.
       "configmanagement": { # **Anthos Config Management**: Configuration for a single cluster. Intended to parallel the ConfigManagement CR. # Config Management-specific spec.
         "binauthz": { # Configuration for Binauthz # Binauthz conifguration for the cluster.
@@ -917,7 +917,7 @@
       },
     },
   },
-  "membershipStates": { # Output only. Membership-specific Feature status. If this Feature does report any per-Membership status, this field may be unused. The keys indicate which Membership the state is for, in the form: projects/{p}/locations/{l}/memberships/{m} Where {p} is the project number, {l} is a valid location and {m} is a valid Membership in this project at that location. {p} MUST match the Feature's project number.
+  "membershipStates": { # Output only. Membership-specific Feature status. If this Feature does report any per-Membership status, this field may be unused. The keys indicate which Membership the state is for, in the form: `projects/{p}/locations/{l}/memberships/{m}` Where {p} is the project number, {l} is a valid location and {m} is a valid Membership in this project at that location. {p} MUST match the Feature's project number.
     "a_key": { # MembershipFeatureState contains Feature status information for a single Membership.
       "configmanagement": { # **Anthos Config Management**: State for a single cluster. # Config Management-specific state.
         "binauthzState": { # State for Binauthz # Binauthz status
@@ -1051,7 +1051,7 @@
   },
   "spec": { # CommonFeatureSpec contains Hub-wide configuration information # Optional. Hub-wide Feature configuration. If this Feature does not support any Hub-wide configuration, this field may be unused.
     "multiclusteringress": { # **Multi-cluster Ingress**: The configuration for the MultiClusterIngress feature. # Multicluster Ingress-specific spec.
-      "billing": "A String", # Customer's billing structure
+      "billing": "A String", # Deprecated: This field will be ignored and should not be set. Customer's billing structure.
       "configMembership": "A String", # Fully-qualified Membership name which hosts the MultiClusterIngress CRD. Example: `projects/foo-proj/locations/global/memberships/bar`
     },
   },