chore: complete google-cloud-gke-hub migration (#16674)

- Reformat with nox
- Enable generation with librarian
- Regenerate with librarian

Author: jskeet

librarian.yaml

@@ -2219,7 +2219,6 @@ libraries:
       - google/cloud/gkehub_v1/rbacrolebindingactuation_v1/types
       - google/cloud/gkehub_v1/rbacrolebindingactuation_v1/types/__init__.py
       - google/cloud/gkehub_v1/rbacrolebindingactuation_v1/types/rbacrolebindingactuation.py
-    skip_generate: true
     python:
       opt_args_by_api:
         google/cloud/gkehub/v1:

packages/google-cloud-gke-hub/.repo-metadata.json

@@ -1,16 +1,15 @@
 {
-  "api_description": "provides a unified way to work with Kubernetes clusters as part of Anthos, extending GKE to work in multiple environments. You have consistent, unified, and secure infrastructure, cluster, and container management, whether you're using Anthos on Google Cloud (with traditional GKE), hybrid cloud, or multiple public clouds.",
-  "api_id": "gkehub.googleapis.com",
-  "api_shortname": "gkehub",
-  "client_documentation": "https://cloud.google.com/python/docs/reference/gkehub/latest",
-  "default_version": "v1",
-  "distribution_name": "google-cloud-gke-hub",
-  "issue_tracker": "",
-  "language": "python",
-  "library_type": "GAPIC_AUTO",
-  "name": "gkehub",
-  "name_pretty": "GKE Hub",
-  "product_documentation": "https://cloud.google.com/anthos/gke/docs/",
-  "release_level": "stable",
-  "repo": "googleapis/google-cloud-python"
+    "api_description": "provides a unified way to work with Kubernetes clusters as part of Anthos, extending GKE to work in multiple environments. You have consistent, unified, and secure infrastructure, cluster, and container management, whether you're using Anthos on Google Cloud (with traditional GKE), hybrid cloud, or multiple public clouds.",
+    "api_id": "gkehub.googleapis.com",
+    "api_shortname": "gkehub",
+    "client_documentation": "https://cloud.google.com/python/docs/reference/gkehub/latest",
+    "default_version": "v1",
+    "distribution_name": "google-cloud-gke-hub",
+    "language": "python",
+    "library_type": "GAPIC_AUTO",
+    "name": "gkehub",
+    "name_pretty": "GKE Hub",
+    "product_documentation": "https://cloud.google.com/anthos/gke/docs/",
+    "release_level": "stable",
+    "repo": "googleapis/google-cloud-python"
 }

packages/google-cloud-gke-hub/google/cloud/gkehub_v1/types/feature.py

@@ -17,12 +17,15 @@
 
 from typing import MutableMapping, MutableSequence
 
-from google.cloud.gkehub_v1 import configmanagement_v1  # type: ignore
-from google.cloud.gkehub_v1 import multiclusteringress_v1  # type: ignore
-from google.cloud.gkehub_v1 import rbacrolebindingactuation_v1  # type: ignore
 import google.protobuf.timestamp_pb2 as timestamp_pb2  # type: ignore
 import proto  # type: ignore
 
+from google.cloud.gkehub_v1 import (
+    configmanagement_v1,  # type: ignore
+    multiclusteringress_v1,  # type: ignore
+    rbacrolebindingactuation_v1,  # type: ignore
+)
+
 __protobuf__ = proto.module(
     package="google.cloud.gkehub.v1",
     manifest={