owner: fix data race on ownerManager.campaignCancel (#56362)#57128

Closed

ti-chi-bot wants to merge 1 commit intopingcap:release-5.4from ti-chi-bot:cherry-pick-56362-to-release-5.4

+1,178

Commits on Nov 5, 2024

This is an automated cherry-pick of pingcap#56362

fishiu
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