br: fix br integration test file corruption (#56799)

[ti-chi-bot]

This is an automated cherry-pick of #56799

What problem does this PR solve?

Issue Number: close #53835

Problem Summary:
The log file may not be restored so sometimes corrupting one log file does not make restore fail.

What changed and how does it work?

lost/corrupt all the files.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No need to test

  • I checked and no code files have been changed.

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[ti-chi-bot]

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[Leavrth]

closed by #56081