ddl: Exchange partition rollback (#45877)#45979

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ti-chi-bot wants to merge 1 commit intopingcap:release-6.1from ti-chi-bot:cherry-pick-45877-to-release-6.1

+2,980-75

Commits on Aug 10, 2023

This is an automated cherry-pick of pingcap#45877

mjonss
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