tests(ticdc): fix bank test

[CharlesCheung96]

What problem does this PR solve?

Issue Number: close #11806

What is changed and how it works?

Check List

Tests

• Integration test
• Manual test (add detailed scripts or steps below)
  

Questions

Will it cause performance regression or break compatibility?

Do you need to update user documentation, design documentation or monitoring documentation?

Release note

Please refer to [Release Notes Language Style Guide](https://pingcap.github.io/tidb-dev-guide/contribute-to-tidb/release-notes-style-guide.html) to write a quality release note.

If you don't think this PR needs a release note then fill it with `None`.

[ti-chi-bot]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[CharlesCheung96]

/test cdc-integration-mysql-test

[CharlesCheung96]

/test cdc-integration-mysql-test

[CharlesCheung96]

/retest

[CharlesCheung96]

/retest

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 57.4534%. Comparing base (482fd8e) to head (594d180).
Report is 83 commits behind head on master.

Additional details and impacted files

Components	Coverage Δ
cdc	61.2047% <ø> (+0.0086%)	⬆️
dm	51.0214% <ø> (-0.1947%)	⬇️
engine	63.4020% <ø> (+0.0494%)	⬆️

Flag	Coverage Δ
unit	57.4534% <ø> (-0.0647%)	⬇️

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

@@               Coverage Diff                @@
##             master     #11407        +/-   ##
================================================
- Coverage   57.5181%   57.4534%   -0.0647%     
================================================
  Files           849        849                
  Lines        126355     126318        -37     
================================================
- Hits          72677      72574       -103     
- Misses        48263      48339        +76     
+ Partials       5415       5405        -10     

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hongyunyan, sdojjy

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Needs approval from an approver in each of these files:

• OWNERS [hongyunyan,sdojjy]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-08-09 09:44:21.48299467 +0000 UTC m=+604391.350093757: ☑️ agreed by hongyunyan.
• 2024-11-27 04:20:33.152061609 +0000 UTC m=+610220.771716124: ☑️ agreed by sdojjy.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-6.5: #11807.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.5: #11808.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.1: #11809.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.1: #11810.