br: add integration test for ingest corner case test (#52734)

[ti-chi-bot]

This is an automated cherry-pick of #52734

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

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 18 lines in your changes are missing coverage. Please review.

Please upload report for BASE (release-7.5@b5825e7). Learn more about missing BASE report.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-7.5     #52766   +/-   ##
================================================
  Coverage               ?   71.9972%           
================================================
  Files                  ?       1411           
  Lines                  ?     410588           
  Branches               ?          0           
================================================
  Hits                   ?     295612           
  Misses                 ?      95122           
  Partials               ?      19854           

Flag	Coverage Δ
unit	71.9972% <0.0000%> (?)

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

Components	Coverage Δ
dumpling	53.9913% <0.0000%> (?)
parser	∅ <0.0000%> (?)
br	53.3144% <0.0000%> (?)

[kennytm]

PTAL @Benjamin2037 or @BornChanger

[Leavrth]

/test pull-br-integration-test

[tiprow]

@Leavrth: No presubmit jobs available for pingcap/tidb@release-7.5

In response to this:

/test pull-br-integration-test

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[Leavrth]

/retest

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-04-25 00:48:57.421215774 +0000 UTC m=+221294.161118686: ☑️ agreed by lance6716.
• 2024-05-22 02:59:04.398915381 +0000 UTC m=+2226898.156050954: ☑️ agreed by 3pointer.

[Benjamin2037]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: 3pointer, Benjamin2037, lance6716

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• br/OWNERS [3pointer]
• pkg/ddl/OWNERS [Benjamin2037]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment