feat(pipeline) migrate tidb nextgen job to gcp (#4471)6 jobs replay pass:pull_build_next_gen |https://prow.tidb.net/jenkins/job/pingcap/job/tidb/job/pull_build_next_gen/5/| SUCCESS | 2026-04-06 22:08:45-- | -- | -- | --pull_integration_e2e_test_next_gen |https://prow.tidb.net/jenkins/job/pingcap/job/tidb/job/pull_integration_e2e_test_next_gen/7/| SUCCESS | 2026-04-07 11:21:49pull_integration_realcluster_test_next_gen |https://prow.tidb.net/jenkins/job/pingcap/job/tidb/job/pull_integration_realcluster_test_next_gen/4/| SUCCESS | 2026-04-06 21:51:57pull_mysql_client_test_next_gen |https://prow.tidb.net/jenkins/job/pingcap/job/tidb/job/pull_mysql_client_test_next_gen/2/| SUCCESS | 2026-04-07 11:16:47pull_unit_test_next_gen |https://prow.tidb.net/jenkins/job/pingcap/job/tidb/job/pull_unit_test_next_gen/11/|SUCCESS | 2026-04-07 09:05:52pull_mysql_test_next_gen |https://prow.tidb.net/jenkins/job/pingcap/job/tidb/job/pull_mysql_test_next_gen/11/|FAILURE (optional: true, same err to IDC)| 2026-04-07 14:08:32 (commit: de4688c)