chore(librarian): onboard google-cloud-monitoring (#14696)

This PR onboards `google-cloud-monitoring` to the librarian system.

Author: ohmayr

.librarian/state.yaml

@@ -4287,3 +4287,26 @@ libraries:
     remove_regex:
       - ^packages/googleapis-common-protos/google/(?:api|cloud|rpc|type)/.*/.*_pb2\.(?:py|pyi)$/
     tag_format: '{id}-v{version}'
+  - id: google-cloud-monitoring
+    version: 2.27.2
+    last_generated_commit: d300b151a973ce0425ae4ad07b3de957ca31bec6
+    apis:
+      - path: google/monitoring/v3
+    source_roots:
+      - packages/google-cloud-monitoring
+    preserve_regex:
+      - packages/google-cloud-monitoring/CHANGELOG.md
+      - docs/CHANGELOG.md
+      - docs/README.rst
+      - docs/query.rst
+      - packages/google-cloud-monitoring/google/cloud/monitoring_v3/_dataframe.py
+      - packages/google-cloud-monitoring/google/cloud/monitoring_v3/query.py
+      - samples/README.txt
+      - scripts/client-post-processing
+      - samples/snippets/README.rst
+      - tests/system
+      - tests/unit/test__dataframe.py
+      - tests/unit/test_query.py
+    remove_regex:
+      - packages/google-cloud-monitoring
+    tag_format: '{id}-v{version}'

scripts/configure_state_yaml/packages_to_onboard.yaml

@@ -133,6 +133,7 @@ packages_to_onboard: [
   "google-cloud-memorystore",
   "google-cloud-migrationcenter",
   "google-cloud-modelarmor",
+  "google-cloud-monitoring",
   "google-cloud-monitoring-metrics-scopes",
   "google-cloud-netapp",
   "google-cloud-network-connectivity",