Support prodcuer port in network endpoint group (GoogleCloudPlatform#11820)

Author: ericlin0101

mmv1/products/compute/RegionNetworkEndpointGroup.yaml

@@ -170,6 +170,20 @@ properties:
     custom_expand: 'templates/terraform/custom_expand/resourceref_with_validation.go.tmpl'
     resource: 'Subnetwork'
     imports: 'selfLink'
+  - name: 'pscData'
+    type: NestedObject
+    description: |
+      This field is only used for PSC NEGs.
+
+    properties:
+      - name: 'producerPort'
+        type: String
+        ignore_read: true
+        description: |
+          The PSC producer port to use when consumer PSC NEG connects to a producer. If
+          this flag isn't specified for a PSC NEG with endpoint type
+          private-service-connect, then PSC NEG will be connected to a first port in the
+          available PSC producer port range.
   - name: 'cloudRun'
     type: NestedObject
     description: |

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

@@ -39,7 +39,7 @@ resource "google_compute_forwarding_rule" "default" {
 
   load_balancing_scheme = "INTERNAL"
   backend_service       = google_compute_region_backend_service.default.id
-  all_ports             = true
+  ports                 = ["80", "88", "443"]
   network               = google_compute_network.default.name
   subnetwork            = google_compute_subnetwork.default.name
 }
@@ -61,7 +61,9 @@ resource "google_compute_region_network_endpoint_group" "{{$.PrimaryResourceId}}
 
   network_endpoint_type = "PRIVATE_SERVICE_CONNECT"
   psc_target_service    = google_compute_service_attachment.default.self_link
-
+  psc_data {
+    producer_port = "88"
+  }
   network               = google_compute_network.default.self_link
   subnetwork            = google_compute_subnetwork.default.self_link
 }