message: add xms-ids for msi
diff: "items": {
  "$ref": "#/definitions/CloudErrorBody"
  },
  + "x-ms-identifiers": [
  + "code"
  + ],
  "description": "A list of additional details about the error."
  }
  },
  "items": {
  "$ref": "#/definitions/Operation"
  },
  + "x-ms-identifiers": [
  + "name"
  + ],
  "title": "Operations List.",
  "description": "A list of operations supported by Microsoft.ManagedIdentity Resource Provider."
  },
  