make event_type required in google_cloudfunctions2_function resource (#14791)

Author: c2thorn

mmv1/products/cloudfunctions2/Function.yaml

@@ -678,6 +678,7 @@ properties:
         default_from_api: true
       - name: 'eventType'
         type: String
+        required: true
         description: 'Required. The type of event to observe.'
       - name: 'eventFilters'
         type: Array

mmv1/third_party/terraform/website/docs/guides/version_7_upgrade.html.markdown

@@ -164,6 +164,10 @@ Remove `description` from your configuration after upgrade.
 
 ## Resource: `google_cloudfunctions2_function`
 
+### `event_trigger.event_type` is now required
+
+The `event_type` field is now required when `event_trigger` is configured.
+
 ### `service_config.service` is changed from `Argument` to `Attribute`
 
 Remove `service_config.service` from your configuration after upgrade.