Add nfs support to cloudrun v1 services.

mmv1/products/cloudrun/Service.yaml

@@ -875,6 +875,28 @@ properties:
                             Driver-specific attributes. The following options are supported for available drivers:
                               * gcsfuse.run.googleapis.com
                                 * bucketName: The name of the Cloud Storage Bucket that backs this volume. The Cloud Run Service identity must have access to this bucket.
+                    - !ruby/object:Api::Type::NestedObject
+                      name: nfs
+                      description: |-
+                        A filesystem backed by a Network File System share. This filesystem requires the
+                        run.googleapis.com/execution-environment annotation to be set to "gen2" and
+                        run.googleapis.com/launch-stage set to "BETA" or "ALPHA".
+                      min_version: beta
+                      properties:
+                        - !ruby/object:Api::Type::String
+                          name: server
+                          required: true
+                          description: |-
+                            IP address or hostname of the NFS server
+                        - !ruby/object:Api::Type::String
+                          name: path
+                          required: true
+                          description: |-
+                            Path exported by the NFS server
+                        - !ruby/object:Api::Type::Boolean
+                          name: readOnly
+                          description: |-
+                            If true, mount the NFS volume as read only in all mounts. Defaults to false.
               - !ruby/object:Api::Type::Enum
                 name: servingState
                 deprecation_message: >-