txn: handle errors returned from Flush (#52890)

[ti-chi-bot]

This is an automated cherry-pick of #52890

What problem does this PR solve?

Issue Number: close #52889

Problem Summary:

What changed and how does it work?

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

[codecov]

Codecov Report

Attention: Patch coverage is 60.00000% with 6 lines in your changes are missing coverage. Please review.

❗ No coverage uploaded for pull request base (release-8.1@7d912d9). Click here to learn what that means.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-8.1     #52961   +/-   ##
================================================
  Coverage               ?   71.1378%           
================================================
  Files                  ?       1463           
  Lines                  ?     420395           
  Branches               ?          0           
================================================
  Hits                   ?     299060           
  Misses                 ?     100890           
  Partials               ?      20445           

Flag	Coverage Δ
unit	71.1378% <60.0000%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
dumpling	53.9957% <0.0000%> (?)
parser	∅ <0.0000%> (?)
br	40.9483% <0.0000%> (?)

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-04-29 07:33:47.916702285 +0000 UTC m=+256181.673837855: ☑️ agreed by MyonKeminta.
• 2024-04-29 07:40:44.793734639 +0000 UTC m=+256598.550870212: ☑️ agreed by cfzjywxk.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cfzjywxk, crazycs520, MyonKeminta

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