Incremental restore: fix the issue that backfill data is not covered by newTS (#54430)#54997

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ti-chi-bot[bot] merged 2 commits intopingcap:release-8.1from ti-chi-bot:cherry-pick-54430-to-release-8.1

Aug 2, 2024

Commits on Jul 29, 2024

This is an automated cherry-pick of pingcap#54430

3pointer
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Commits on Aug 2, 2024

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