feat: turns on self-signed JWT feature flag (#271)

- [ ] Regenerate this pull request now. PiperOrigin-RevId: 392067151 Source-Link: googleapis/googleapis@06345f7 Source-Link: https://github.com/googleapis/googleapis-gen/commit/95882b37970e41e4cd51b22fa507cfd46dc7c4b6

Author: gcf-owl-bot[bot]

src/v1/cloud_build_client.ts

@@ -140,6 +140,12 @@ export class CloudBuildClient {
  // Save the auth object to the client, for use by other methods.
  this.auth = this._gaxGrpc.auth as gax.GoogleAuth;
 
+ // Set useJWTAccessWithScope on the auth object.
+ this.auth.useJWTAccessWithScope = true;
+
+ // Set defaultServicePath on the auth object.
+ this.auth.defaultServicePath = staticMembers.servicePath;
+
  // Set the default scopes in auth client if needed.
  if (servicePath === staticMembers.servicePath) {
  this.auth.defaultScopes = staticMembers.scopes;
@@ -3555,6 +3561,7 @@ export class CloudBuildClient {
  return this.cloudBuildStub!.then(stub => {
  this._terminated = true;
  stub.close();
+ this.operationsClient.close();
  });
  }
  return Promise.resolve();