feat: expose the numeric id attribute as generated_id for the google_compute_network_endpoint_group (#13914)

Co-authored-by: Scott Suarez <ScottSuarez@google.com>

Author: ramonvermeulen

mmv1/products/compute/NetworkEndpointGroup.yaml

@@ -143,3 +143,9 @@ properties:
     description: |
       The default port used if the port number is not specified in the
       network endpoint.
+  - name: 'generated_id'
+    type: Integer
+    api_name: 'id'
+    output: true
+    description: |
+      The uniquely generated identifier for the resource. This identifier is defined by the server.

mmv1/third_party/terraform/services/compute/data_source_compute_network_endpoint_group_test.go

@@ -61,6 +61,11 @@ func testAccDataSourceComputeNetworkEndpointGroupCheck(data_source_name string,
 				)
 			}
 		}
+
+		if v, ok := ds_attr["generated_id"]; !ok || v == "" {
+			return fmt.Errorf("generated_id is not set")
+		}
+
 		return nil
 	}
 }