br: add integration test for ingest corner case test

[Leavrth]

What problem does this PR solve?

Issue Number: close #52733

Problem Summary:
When creating index, log backup should be able to start.

What changed and how does it work?

remove the check, and add integration test.

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

[tiprow]

Hi @Leavrth. Thanks for your PR.

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[codecov]

Codecov Report

Merging #52734 (e7c0b65) into master (72e5460) will increase coverage by 2.7256%.
Report is 5 commits behind head on master.
The diff coverage is 0.0000%.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #52734        +/-   ##
================================================
+ Coverage   72.3230%   75.0486%   +2.7256%     
================================================
  Files          1471       1473         +2     
  Lines        427219     427745       +526     
================================================
+ Hits         308978     321017     +12039     
+ Misses        98951      86477     -12474     
- Partials      19290      20251       +961     

Flag	Coverage Δ
integration	49.9035% <0.0000%> (?)
unit	71.1886% <0.0000%> (-0.0107%)	⬇️

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

Components	Coverage Δ
dumpling	53.9957% <ø> (ø)
parser	∅ <ø> (∅)
br	59.8023% <ø> (+18.6322%)	⬆️

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-04-19 02:19:40.663298682 +0000 UTC m=+563799.774345131: ☑️ agreed by lance6716.
• 2024-04-19 08:32:51.174262469 +0000 UTC m=+586190.285308918: ☑️ agreed by BornChanger.

[BornChanger]

/cc @Benjamin2037

[Benjamin2037]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Benjamin2037, BornChanger, lance6716

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Needs approval from an approver in each of these files:

• br/OWNERS [BornChanger]
• pkg/ddl/OWNERS [Benjamin2037]

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[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.1: #52765.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.5: #52766.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.1: #52767.