feat: allow updating security group on existing clusters (#123)

PiperOrigin-RevId: 383869440

Source-Link: googleapis/googleapis@e2b7a98

Source-Link: googleapis/googleapis-gen@5476d7b

packages/google-cloud-container/google/cloud/container_v1/types/cluster_service.py

@@ -1401,6 +1401,9 @@ class ClusterUpdate(proto.Message):
             default sNAT for this cluster.
         desired_release_channel (google.cloud.container_v1.types.ReleaseChannel):
             The desired release channel configuration.
+        desired_authenticator_groups_config (google.cloud.container_v1.types.AuthenticatorGroupsConfig):
+            The desired authenticator groups config for
+            the cluster.
         desired_master_version (str):
             The Kubernetes version to change the master
             to.
@@ -1464,6 +1467,9 @@ class ClusterUpdate(proto.Message):
     desired_release_channel = proto.Field(
         proto.MESSAGE, number=31, message="ReleaseChannel",
     )
+    desired_authenticator_groups_config = proto.Field(
+        proto.MESSAGE, number=63, message="AuthenticatorGroupsConfig",
+    )
     desired_master_version = proto.Field(proto.STRING, number=100,)