message: Adding identity to RegistryCredentials
diff: "passwordSecretRef": {
  "description": "The name of the Secret that contains the registry login password",
  "type": "string"
  + },
  + "identity": {
  + "description": "A Managed Identity to use to authenticate with Azure Container Registry. For user-assigned identities, use the full user-assigned identity Resource ID. For system-assigned identities, use 'system'",
  + "type": "string"
  }
  }
  },
  