chore: Update discovery artifacts (#1477)

## Deleted keys were detected in the following stable discovery artifacts:
apigee v1 https://github.com/googleapis/google-api-python-client/commit/4485c5f3b32c9bda4f50a2a96c5870414f7d870f
sqladmin v1 https://github.com/googleapis/google-api-python-client/commit/41d51e34759b181692ed96d9d490a9cfc5a28459

## Deleted keys were detected in the following pre-stable discovery artifacts:
sqladmin v1beta4 https://github.com/googleapis/google-api-python-client/commit/41d51e34759b181692ed96d9d490a9cfc5a28459
transcoder v1beta1 https://github.com/googleapis/google-api-python-client/commit/1e0b0854e31f52013a8c5423efbd5e34c953e08c

## Discovery Artifact Change Summary:
feat(accesscontextmanager): update the api https://github.com/googleapis/google-api-python-client/commit/30216a669249442cac8f0fb8bb347b1352d8f087
feat(alertcenter): update the api https://github.com/googleapis/google-api-python-client/commit/39b084706537111e8403be6e69f0fc9d82b2f383
feat(apigee): update the api https://github.com/googleapis/google-api-python-client/commit/4485c5f3b32c9bda4f50a2a96c5870414f7d870f
feat(bigquery): update the api https://github.com/googleapis/google-api-python-client/commit/304bbde2360066caf55575e3be5a04fdc8bf8b09
feat(chromemanagement): update the api https://github.com/googleapis/google-api-python-client/commit/0ba28b47236a81a996a3607567b61ab38150617d
feat(cloudasset): update the api https://github.com/googleapis/google-api-python-client/commit/792aa5593ea64ceb4b565e950e153e396274b3b8
feat(cloudbuild): update the api https://github.com/googleapis/google-api-python-client/commit/6b06387ca29e76d26f257c7a4eb6864fe27e082e
feat(cloudchannel): update the api https://github.com/googleapis/google-api-python-client/commit/0b0444ea192f79c5564745be8b1d52b52a74d1fb
feat(cloudkms): update the api https://github.com/googleapis/google-api-python-client/commit/7dc278459cbd32bf15b39633327743cfa0beeea3
feat(composer): update the api https://github.com/googleapis/google-api-python-client/commit/92131bff38ab7644e549f3d71f9c0a84755455db
feat(container): update the api https://github.com/googleapis/google-api-python-client/commit/53d8b4b3e3c5d16ffd14ba1af1cf1769d9249067
feat(containeranalysis): update the api https://github.com/googleapis/google-api-python-client/commit/9ab94f3f4c2ccafdf8b298dad8c6a5c2aa61a606
feat(dialogflow): update the api https://github.com/googleapis/google-api-python-client/commit/b49bfdaedbed3378b061e85f937a36e97732fcd4
feat(iam): update the api https://github.com/googleapis/google-api-python-client/commit/0832247d126965b472a271167028499f015de1ae
feat(metastore): update the api https://github.com/googleapis/google-api-python-client/commit/dd83236343d603e964613b16e9afa25eff60f97c
feat(ondemandscanning): update the api https://github.com/googleapis/google-api-python-client/commit/6ffbe182425ec217230fc083e217676e915bb786
feat(osconfig): update the api https://github.com/googleapis/google-api-python-client/commit/e079d43be4291ca10be7caf432012c6553e0398e
feat(oslogin): update the api https://github.com/googleapis/google-api-python-client/commit/d3ec653bdd293a63ae0b3772ce83e1fda73d5de5
feat(pubsub): update the api https://github.com/googleapis/google-api-python-client/commit/06dfff22baec2551508b93e29e4c36fa442ab299
feat(pubsublite): update the api https://github.com/googleapis/google-api-python-client/commit/4287a7d537741391a9afe9e669b98010ed4fc0ab
feat(recaptchaenterprise): update the api https://github.com/googleapis/google-api-python-client/commit/ebfeb8fc00a1c6a8603b35640845c5cdacf53cb2
feat(recommender): update the api https://github.com/googleapis/google-api-python-client/commit/01f2d6cc989ce337537a51ead8ffd3d6fc7e6c5d
feat(speech): update the api https://github.com/googleapis/google-api-python-client/commit/601afcf08fd96421b64ef4c6f098f09f0748ce69
feat(sqladmin): update the api https://github.com/googleapis/google-api-python-client/commit/41d51e34759b181692ed96d9d490a9cfc5a28459
feat(tagmanager): update the api https://github.com/googleapis/google-api-python-client/commit/47a522aac79ae9283a0c7ee7a2d0716e605d8c21
feat(transcoder): update the api https://github.com/googleapis/google-api-python-client/commit/1e0b0854e31f52013a8c5423efbd5e34c953e08c
diff --git a/googleapiclient/discovery_cache/documents/osconfig.v1alpha.json b/googleapiclient/discovery_cache/documents/osconfig.v1alpha.json
index 54fe82b..0ec5492 100644
--- a/googleapiclient/discovery_cache/documents/osconfig.v1alpha.json
+++ b/googleapiclient/discovery_cache/documents/osconfig.v1alpha.json
@@ -249,7 +249,7 @@
                           "type": "string"
                         },
                         "parent": {
-                          "description": "Required. The parent resource name. Format: `projects/{project}/locations/{location}/instances/{instance}` For `{project}`, either `project-number` or `project-id` can be provided. For `{instance}`, only hyphen or dash character is supported to list inventories across VMs.",
+                          "description": "Required. The parent resource name. Format: `projects/{project}/locations/{location}/instances/-` For `{project}`, either `project-number` or `project-id` can be provided.",
                           "location": "path",
                           "pattern": "^projects/[^/]+/locations/[^/]+/instances/[^/]+$",
                           "required": true,
@@ -334,7 +334,7 @@
                           "type": "string"
                         },
                         "parent": {
-                          "description": "Required. The parent resource name. Format: `projects/{project}/locations/{location}/instances/{instance}` For `{project}`, either `project-number` or `project-id` can be provided. For `{instance}`, only `-` character is supported to list vulnerability reports across VMs.",
+                          "description": "Required. The parent resource name. Format: `projects/{project}/locations/{location}/instances/-` For `{project}`, either `project-number` or `project-id` can be provided.",
                           "location": "path",
                           "pattern": "^projects/[^/]+/locations/[^/]+/instances/[^/]+$",
                           "required": true,
@@ -610,7 +610,7 @@
       }
     }
   },
-  "revision": "20210723",
+  "revision": "20210803",
   "rootUrl": "https://osconfig.googleapis.com/",
   "schemas": {
     "CVSSv3": {
@@ -1393,6 +1393,10 @@
           "description": "OS policy assignment description. Length of the description is limited to 1024 characters.",
           "type": "string"
         },
+        "etag": {
+          "description": "The etag for this OS policy assignment. If this is provided on update, it must match the server's etag.",
+          "type": "string"
+        },
         "instanceFilter": {
           "$ref": "OSPolicyAssignmentInstanceFilter",
           "description": "Required. Filter to select VMs."
@@ -1456,7 +1460,7 @@
       "type": "object"
     },
     "OSPolicyAssignmentInstanceFilter": {
-      "description": "Message to represent the filters to select VMs for an assignment",
+      "description": "Filters to select target VMs for an assignment. If more than one filter criteria is specified below, a VM will be selected if and only if it satisfies all of them.",
       "id": "OSPolicyAssignmentInstanceFilter",
       "properties": {
         "all": {
@@ -1464,7 +1468,7 @@
           "type": "boolean"
         },
         "exclusionLabels": {
-          "description": "List of label sets used for VM exclusion. If the list has more than one label set, the VM is excluded if any of the label sets are applicable for the VM. This filter is applied last in the filtering chain and therefore a VM is guaranteed to be excluded if it satisfies one of the below label sets.",
+          "description": "List of label sets used for VM exclusion. If the list has more than one label set, the VM is excluded if any of the label sets are applicable for the VM.",
           "items": {
             "$ref": "OSPolicyAssignmentLabelSet"
           },
@@ -1477,8 +1481,15 @@
           },
           "type": "array"
         },
+        "inventories": {
+          "description": "List of inventories to select VMs. A VM is selected if its inventory data matches at least one of the following inventories.",
+          "items": {
+            "$ref": "OSPolicyAssignmentInstanceFilterInventory"
+          },
+          "type": "array"
+        },
         "osShortNames": {
-          "description": "A VM is included if it's OS short name matches with any of the values provided in this list.",
+          "description": "A VM is selected if it's OS short name matches with any of the values provided in this list.",
           "items": {
             "type": "string"
           },
@@ -1487,6 +1498,21 @@
       },
       "type": "object"
     },
+    "OSPolicyAssignmentInstanceFilterInventory": {
+      "description": "VM inventory details.",
+      "id": "OSPolicyAssignmentInstanceFilterInventory",
+      "properties": {
+        "osShortName": {
+          "description": "Required. The OS short name",
+          "type": "string"
+        },
+        "osVersion": {
+          "description": "The OS version Prefix matches are supported if asterisk(*) is provided as the last character. For example, to match all versions with a major version of `7`, specify the following value for this field `7.*` An empty string matches all OS versions.",
+          "type": "string"
+        }
+      },
+      "type": "object"
+    },
     "OSPolicyAssignmentLabelSet": {
       "description": "Message representing label set. * A label is a key value pair set for a VM. * A LabelSet is a set of labels. * Labels within a LabelSet are ANDed. In other words, a LabelSet is applicable for a VM only if it matches all the labels in the LabelSet. * Example: A LabelSet with 2 labels: `env=prod` and `type=webserver` will only be applicable for those VMs with both labels present.",
       "id": "OSPolicyAssignmentLabelSet",
@@ -1572,8 +1598,23 @@
       },
       "type": "object"
     },
+    "OSPolicyInventoryFilter": {
+      "description": "Filtering criteria to select VMs based on inventory details.",
+      "id": "OSPolicyInventoryFilter",
+      "properties": {
+        "osShortName": {
+          "description": "Required. The OS short name",
+          "type": "string"
+        },
+        "osVersion": {
+          "description": "The OS version Prefix matches are supported if asterisk(*) is provided as the last character. For example, to match all versions with a major version of `7`, specify the following value for this field `7.*` An empty string matches all OS versions.",
+          "type": "string"
+        }
+      },
+      "type": "object"
+    },
     "OSPolicyOSFilter": {
-      "description": "The `OSFilter` is used to specify the OS filtering criteria for the resource group.",
+      "description": "Filtering criteria to select VMs based on OS details.",
       "id": "OSPolicyOSFilter",
       "properties": {
         "osShortName": {
@@ -1867,6 +1908,13 @@
       "description": "Resource groups provide a mechanism to group OS policy resources. Resource groups enable OS policy authors to create a single OS policy to be applied to VMs running different operating Systems. When the OS policy is applied to a target VM, the appropriate resource group within the OS policy is selected based on the `OSFilter` specified within the resource group.",
       "id": "OSPolicyResourceGroup",
       "properties": {
+        "inventoryFilters": {
+          "description": "List of inventory filters for the resource group. The resources in this resource group are applied to the target VM if it satisfies at least one of the following inventory filters. For example, to apply this resource group to VMs running either `RHEL` or `CentOS` operating systems, specify 2 items for the list with following values: inventory_filters[0].os_short_name='rhel' and inventory_filters[1].os_short_name='centos' If the list is empty, this resource group will be applied to the target VM unconditionally.",
+          "items": {
+            "$ref": "OSPolicyInventoryFilter"
+          },
+          "type": "array"
+        },
         "osFilter": {
           "$ref": "OSPolicyOSFilter",
           "description": "Used to specify the OS filter for a resource group"
@@ -2314,6 +2362,10 @@
       "description": "A reference for this vulnerability.",
       "id": "VulnerabilityReportVulnerabilityDetailsReference",
       "properties": {
+        "source": {
+          "description": "The source of the reference e.g. NVD.",
+          "type": "string"
+        },
         "url": {
           "description": "The url of the reference.",
           "type": "string"