Added unexpected internal-only Network RP properties (Azure#16644)

* Added suppression because Network RP is sending undocumented properties

* Removed suppression and added properties from NRP request

* Adding operations status to the NRP Proxy resource

specification/deviceupdate/resource-manager/Microsoft.DeviceUpdate/preview/2020-03-01-preview/deviceupdate.json

@@ -1555,6 +1555,10 @@
         "provisioningState": {
           "$ref": "#/definitions/PrivateEndpointConnectionProxyProvisioningState",
           "description": "The provisioning state of the private endpoint connection proxy resource."
+        },
+        "status": {
+          "description": "Operation status.",
+          "type": "string"
         }
       }
     },
@@ -1687,6 +1691,14 @@
           "description": "Internal FQDN.",
           "type": "string",
           "readOnly": true
+        },
+        "redirectMapId": {
+          "description": "Redirect map ID.",
+          "type": "string"
+        },
+        "privateLinkServiceArmRegion": {
+          "description": "PrivateLinkService ARM region.",
+          "type": "string"
         }
       }
     },