fixes: permadiff issue if event trigger region is not specified (#9989)

* fixes: permadiff issue if event trigger region is not specified

- fixes hashicorp/terraform-provider-google#17161

* chore: Updated cloudfunction2 test with no explicit trigger_region

mmv1/products/cloudfunctions2/Function.yaml

@@ -594,6 +594,7 @@ properties:
           events originating in this region. It can be the same
           region as the function, a different region or multi-region, or the global
           region. If not provided, defaults to the same region as the function.
+        default_from_api: true
       - !ruby/object:Api::Type::String
         name: 'eventType'
         description: 'Required. The type of event to observe.'

mmv1/templates/terraform/examples/cloudfunctions2_basic_gcs.tf.erb

@@ -91,7 +91,6 @@ resource "google_cloudfunctions2_function" "<%= ctx[:primary_resource_id] %>" {
   }
 
   event_trigger {
-    trigger_region = "us-central1" # The trigger must be in the same location as the bucket
     event_type = "google.cloud.storage.object.v1.finalized"
     retry_policy = "RETRY_POLICY_RETRY"
     service_account_email = google_service_account.account.email