feat: Add new gcloud commands, API clients, and third-party libraries across various services.

gcloud auth application-default login/google-cloud-sdk/lib/surface/memcache/instances/upgrade.yaml

@@ -0,0 +1,50 @@
+release_tracks: [ALPHA, BETA, GA]
+
+help_text:
+  brief: |
+    Upgrade memcache instance to a newer memcached version
+  description: |
+    Upgrade memcahce instance to a newer memcached version.
+  examples: |
+    To upgrade memcache version of an instance with the name 'my-memcache-instance' in region
+    'us-central-1' to MEMCACHE_1_6_15
+
+      $ {command} my-memcache-instance --region=us-central1 --memcached-version="1.6.15"
+
+arguments:
+  resource:
+    spec: !REF googlecloudsdk.command_lib.memcache.resources:instance
+    help_text: |
+      Arguments and flags that specify the Memorystore for Memcached instance you
+      want to upgrade.
+  params:
+  - arg_name: memcached-version
+    ALPHA:
+      api_field: googleCloudMemcacheV1beta2UpgradeInstanceRequest.memcacheVersion
+    BETA:
+      api_field: googleCloudMemcacheV1beta2UpgradeInstanceRequest.memcacheVersion
+    GA:
+      api_field: googleCloudMemcacheV1UpgradeInstanceRequest.memcacheVersion
+    required: true
+    choices:
+    - arg_value: 1.6.15
+      enum_value: MEMCACHE_1_6_15
+      help_text: Memcached engine version 1.6.15
+    help_text: Memcached engine version to which instance should be upgraded to.
+
+async:
+  collection: memcache.projects.locations.operations
+
+input:
+  confirmation_prompt: |-
+    WARNING: Upgrading the Memcached instance causes a full cache flush on the instance. Some nodes of the instance are temporarily unavailable during the duration of upgrade. For more information, see the "Behaviour during version upgrade" section of the official Memorystore for Memcached documentation.
+
+request:
+  ALPHA:
+    api_version: v1beta2
+  BETA:
+    api_version: v1beta2
+  GA:
+    api_version: v1
+  collection: memcache.projects.locations.instances
+  method: upgrade