kv-client(cdc): fix the bug that region errors can be lost (#9963)#9977

Merged

ti-chi-bot[bot] merged 1 commit intopingcap:release-7.5from ti-chi-bot:cherry-pick-9963-to-release-7.5

Oct 31, 2023

+80-44

Commits on Oct 31, 2023

kv-client(cdc): fix the bug that region errors can be lost (pingcap#9963 )

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