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/composer_v1.projects.locations.environments.html b/docs/dyn/composer_v1.projects.locations.environments.html
index ea51143..f1ef85e 100644
--- a/docs/dyn/composer_v1.projects.locations.environments.html
+++ b/docs/dyn/composer_v1.projects.locations.environments.html
@@ -550,7 +550,7 @@
   "uuid": "A String", # Output only. The UUID (Universally Unique IDentifier) associated with this environment. This value is generated when the environment is created.
 }
 
-  updateMask: string, Required. A comma-separated list of paths, relative to `Environment`, of fields to update. For example, to set the version of scikit-learn to install in the environment to 0.19.0 and to remove an existing installation of numpy, the `updateMask` parameter would include the following two `paths` values: "config.softwareConfig.pypiPackages.scikit-learn" and "config.softwareConfig.pypiPackages.numpy". The included patch environment would specify the scikit-learn version as follows: { "config":{ "softwareConfig":{ "pypiPackages":{ "scikit-learn":"==0.19.0" } } } } Note that in the above example, any existing PyPI packages other than scikit-learn and numpy will be unaffected. Only one update type may be included in a single request's `updateMask`. For example, one cannot update both the PyPI packages and labels in the same request. However, it is possible to update multiple members of a map field simultaneously in the same request. For example, to set the labels "label1" and "label2" while clearing "label3" (assuming it already exists), one can provide the paths "labels.label1", "labels.label2", and "labels.label3" and populate the patch environment as follows: { "labels":{ "label1":"new-label1-value" "label2":"new-label2-value" } } Note that in the above example, any existing labels that are not included in the `updateMask` will be unaffected. It is also possible to replace an entire map field by providing the map field's path in the `updateMask`. The new value of the field will be that which is provided in the patch environment. For example, to delete all pre-existing user-specified PyPI packages and install botocore at version 1.7.14, the `updateMask` would contain the path "config.softwareConfig.pypiPackages", and the patch environment would be the following: { "config":{ "softwareConfig":{ "pypiPackages":{ "botocore":"==1.7.14" } } } } **Note:** Only the following fields can be updated: *Mask* *Purpose* config.softwareConfig.pypiPackages Replace all custom custom PyPI packages. If a replacement package map is not included in `environment`, all custom PyPI packages are cleared. It is an error to provide both this mask and a mask specifying an individual package. config.softwareConfig.pypiPackages.packagename Update the custom PyPI package packagename, preserving other packages. To delete the package, include it in `updateMask`, and omit the mapping for it in `environment.config.softwareConfig.pypiPackages`. It is an error to provide both a mask of this form and the "config.softwareConfig.pypiPackages" mask. labels Replace all environment labels. If a replacement labels map is not included in `environment`, all labels are cleared. It is an error to provide both this mask and a mask specifying one or more individual labels. labels.labelName Set the label named labelName, while preserving other labels. To delete the label, include it in `updateMask` and omit its mapping in `environment.labels`. It is an error to provide both a mask of this form and the "labels" mask. config.nodeCount Horizontally scale the number of nodes in the environment. An integer greater than or equal to 3 must be provided in the `config.nodeCount` field. config.webServerNetworkAccessControl Replace the environment's current WebServerNetworkAccessControl. config.databaseConfig Replace the environment's current DatabaseConfig. config.webServerConfig Replace the environment's current WebServerConfig. config.softwareConfig.airflowConfigOverrides Replace all Apache Airflow config overrides. If a replacement config overrides map is not included in `environment`, all config overrides are cleared. It is an error to provide both this mask and a mask specifying one or more individual config overrides. config.softwareConfig.airflowConfigOverrides.section-name Override the Apache Airflow config property name in the section named section, preserving other properties. To delete the property override, include it in `updateMask` and omit its mapping in `environment.config.softwareConfig.airflowConfigOverrides`. It is an error to provide both a mask of this form and the "config.softwareConfig.airflowConfigOverrides" mask. config.softwareConfig.envVariables Replace all environment variables. If a replacement environment variable map is not included in `environment`, all custom environment variables are cleared. It is an error to provide both this mask and a mask specifying one or more individual environment variables. 
+  updateMask: string, Required. A comma-separated list of paths, relative to `Environment`, of fields to update. For example, to set the version of scikit-learn to install in the environment to 0.19.0 and to remove an existing installation of numpy, the `updateMask` parameter would include the following two `paths` values: "config.softwareConfig.pypiPackages.scikit-learn" and "config.softwareConfig.pypiPackages.numpy". The included patch environment would specify the scikit-learn version as follows: { "config":{ "softwareConfig":{ "pypiPackages":{ "scikit-learn":"==0.19.0" } } } } Note that in the above example, any existing PyPI packages other than scikit-learn and numpy will be unaffected. Only one update type may be included in a single request's `updateMask`. For example, one cannot update both the PyPI packages and labels in the same request. However, it is possible to update multiple members of a map field simultaneously in the same request. For example, to set the labels "label1" and "label2" while clearing "label3" (assuming it already exists), one can provide the paths "labels.label1", "labels.label2", and "labels.label3" and populate the patch environment as follows: { "labels":{ "label1":"new-label1-value" "label2":"new-label2-value" } } Note that in the above example, any existing labels that are not included in the `updateMask` will be unaffected. It is also possible to replace an entire map field by providing the map field's path in the `updateMask`. The new value of the field will be that which is provided in the patch environment. For example, to delete all pre-existing user-specified PyPI packages and install botocore at version 1.7.14, the `updateMask` would contain the path "config.softwareConfig.pypiPackages", and the patch environment would be the following: { "config":{ "softwareConfig":{ "pypiPackages":{ "botocore":"==1.7.14" } } } } **Note:** Only the following fields can be updated: * `config.softwareConfig.pypiPackages` * Replace all custom custom PyPI packages. If a replacement package map is not included in `environment`, all custom PyPI packages are cleared. It is an error to provide both this mask and a mask specifying an individual package. * `config.softwareConfig.pypiPackages.`packagename * Update the custom PyPI package *packagename*, preserving other packages. To delete the package, include it in `updateMask`, and omit the mapping for it in `environment.config.softwareConfig.pypiPackages`. It is an error to provide both a mask of this form and the `config.softwareConfig.pypiPackages` mask. * `labels` * Replace all environment labels. If a replacement labels map is not included in `environment`, all labels are cleared. It is an error to provide both this mask and a mask specifying one or more individual labels. * `labels.`labelName * Set the label named *labelName*, while preserving other labels. To delete the label, include it in `updateMask` and omit its mapping in `environment.labels`. It is an error to provide both a mask of this form and the `labels` mask. * `config.nodeCount` * Horizontally scale the number of nodes in the environment. An integer greater than or equal to 3 must be provided in the `config.nodeCount` field. * `config.webServerNetworkAccessControl` * Replace the environment's current `WebServerNetworkAccessControl`. * `config.databaseConfig` * Replace the environment's current `DatabaseConfig`. * `config.webServerConfig` * Replace the environment's current `WebServerConfig`. * `config.softwareConfig.airflowConfigOverrides` * Replace all Apache Airflow config overrides. If a replacement config overrides map is not included in `environment`, all config overrides are cleared. It is an error to provide both this mask and a mask specifying one or more individual config overrides. * `config.softwareConfig.airflowConfigOverrides.`section-name * Override the Apache Airflow config property *name* in the section named *section*, preserving other properties. To delete the property override, include it in `updateMask` and omit its mapping in `environment.config.softwareConfig.airflowConfigOverrides`. It is an error to provide both a mask of this form and the `config.softwareConfig.airflowConfigOverrides` mask. * `config.softwareConfig.envVariables` * Replace all environment variables. If a replacement environment variable map is not included in `environment`, all custom environment variables are cleared. It is an error to provide both this mask and a mask specifying one or more individual environment variables.
   x__xgafv: string, V1 error format.
     Allowed values
       1 - v1 error format