feat(cloud-function-v2): add support for auto_update_policy (#3881)

Co-authored-by: Julio Castillo <jccb@google.com>
Co-authored-by: Ludovico Magnocavallo <ludomagno@google.com>

tests/modules/cloud_function_v2/examples/automatic-update-policy.yaml

@@ -0,0 +1,27 @@
+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+values:
+  module.cf-http.google_cloudfunctions2_function.function:
+    build_config:
+    - automatic_update_policy:
+      - {}
+      entry_point: main
+      on_deploy_update_policy: []
+      runtime: python310
+
+counts:
+  google_cloudfunctions2_function: 1
+
+outputs: {}