Changes

chore(pingcap/tidb): update job `pull_integration_realcluster_test_next_gen` (#3675)

This pull request makes a small adjustment to the test pipeline by
removing one of the test scripts from the integration test suite. The
change streamlines the set of tests that are executed in the pipeline.

- Removed the execution of the `bazel_brietest` test script from the
integration test values in `pipeline.groovy`.
 (commit: 82af854)