ddl: backport of (#38738) tidb_ddl_reorg commit conflicts#41115

Merged

ti-chi-bot merged 9 commits intopingcap:release-6.5from mjonss:cherry-pick-38738-6.5

Apr 11, 2023

+251-103

Commits on Feb 6, 2023

Commits on Feb 21, 2023

Merge remote-tracking branch 'pingcap/release-6.5' into cherry-pick-38738-6.5
mjonss
committed

Commits on Apr 10, 2023

Merge remote-tracking branch 'pingcap/release-6.5' into cherry-pick-38738-6.5
mjonss
committed
Test cleanup, don't leave global variables changed after test
mjonss
committed
Merge remote-tracking branch 'pingcap/release-6.5' into cherry-pick-38738-6.5
mjonss
committed

Commits on Apr 11, 2023