message: add xms-ids for PowerBIPrivateLinks
diff: "items": {
  "$ref": "#/definitions/GroupConnectivityInformation"
  },
  + "x-ms-identifiers": [
  + "groupId",
  + "memberName"
  + ],
  "description": "Specifies the group connectivity information of the private link service proxy."
  },
  "remotePrivateLinkServiceConnectionState": {
  