gke-cluster-autopilot: add logging configuration (#1625)

Although one cannot disable Cloud Logging and Cloud Monitoring integration in GKE Autopilot clusters, one has some flexibility over which control plane components' logs should be ingested. This commit adds a new variable and a block to the cluster resource to facilitate that.

* gke-cluster-autopilot: update logging configuration and add an example to module README

tests/modules/gke_cluster_autopilot/examples/logging-config.yaml

@@ -0,0 +1,26 @@
+# Copyright 2023 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.cluster-1.google_container_cluster.cluster:
+    logging_config:
+    - enable_components:
+      - APISERVER
+      - CONTROLLER_MANAGER
+      - SCHEDULER
+      - SYSTEM_COMPONENTS
+      - WORKLOADS
+
+counts:
+  google_container_cluster: 1