br: make table existence check unified on different br client (#58211)

[ti-chi-bot]

This is an automated cherry-pick of #58211

What problem does this PR solve?

Issue Number: close #58168

Problem Summary:

What changed and how does it work?

Remove the client check of tableExistenceCheck, now it works on both sql and cli client.

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]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: BornChanger, YuJuncen

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-12-13 07:57:57.927942564 +0000 UTC m=+598068.016745109: ☑️ agreed by BornChanger.
• 2024-12-13 08:01:45.541588322 +0000 UTC m=+598295.630390864: ☑️ agreed by YuJuncen.

[BornChanger]

/retest

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 20 lines in your changes missing coverage. Please review.

Please upload report for BASE (release-8.1@20e7389). Learn more about missing BASE report.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-8.1     #58244   +/-   ##
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  Coverage               ?   71.2308%           
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  Files                  ?       1468           
  Lines                  ?     423784           
  Branches               ?          0           
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  Hits                   ?     301865           
  Misses                 ?     101411           
  Partials               ?      20508           

Flag	Coverage Δ
unit	71.2308% <0.0000%> (?)

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

Components	Coverage Δ
dumpling	52.9656% <0.0000%> (?)
parser	∅ <0.0000%> (?)
br	41.3314% <0.0000%> (?)

[jebter]

/retest

[ti-chi-bot]

@ti-chi-bot: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
idc-jenkins-ci-tidb/check_dev_2	c067d3c	link	unknown	/test check-dev2

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