eventarc: add retry_policy field to google_eventarc_trigger resource (#15909)

Author: tommyreddad

mmv1/products/eventarc/Trigger.yaml

@@ -264,3 +264,15 @@ properties:
     type: String
     description: Optional. EventDataContentType specifies the type of payload in MIME format that is expected from the CloudEvent data field. This is set to `application/json` if the value is not defined.
     default_from_api: true
+  - name: retryPolicy
+    type: NestedObject
+    description: |-
+      The retry policy configuration for the Trigger.
+
+      Can only be set with Cloud Run destinations.
+    properties:
+      - name: maxAttempts
+        type: Integer
+        description: |-
+          The maximum number of delivery attempts for any message. The only valid
+          value is 1.

mmv1/templates/terraform/examples/eventarc_trigger_with_cloud_run_destination.tf.tmpl

@@ -19,6 +19,9 @@ resource "google_eventarc_trigger" "{{$.PrimaryResourceId}}" {
       topic = google_pubsub_topic.foo.id
     }
   }
+  retry_policy {
+    max_attempts = 1
+  }
 }
 
 resource "google_pubsub_topic" "foo" {