br/lightning: add cleanUp files util

[ywqzzy]

What problem does this PR solve?

Issue Number: ref #45719

Problem Summary:

What is changed and how it works?

CleanUp all files under one subdir.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

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 @ywqzzy. Thanks for your PR.

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[tangenta]

Suggested change

	Build(store, 0, "/subtask")
	Build(store, "/subtask", 0)

I have changed the parameter order in #46387.

[codecov]

Codecov Report

Merging #46389 (41de3a8) into master (3190885) will decrease coverage by 0.6435%.
Report is 7 commits behind head on master.
The diff coverage is 62.5000%.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #46389        +/-   ##
================================================
- Coverage   73.4100%   72.7666%   -0.6435%     
================================================
  Files          1292       1316        +24     
  Lines        393585     400101      +6516     
================================================
+ Hits         288931     291140      +2209     
- Misses        86282      90534      +4252     
- Partials      18372      18427        +55     

Flag	Coverage Δ
integration	25.6789% <ø> (?)
unit	73.4446% <62.5000%> (+0.0345%)	⬆️

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

Components	Coverage Δ
dumpling	54.0444% <ø> (ø)
parser	85.0633% <ø> (ø)
br	47.9929% <62.5000%> (-4.3655%)	⬇️

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: tangenta, wjhuang2016

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-08-24 06:48:59.022111391 +0000 UTC m=+1391303.571127379: ☑️ agreed by tangenta.
• 2023-08-24 06:58:16.175272351 +0000 UTC m=+1391860.724288338: ☑️ agreed by wjhuang2016.

[lance6716]

/hold

need to address comment

[ywqzzy]

/hold

[ywqzzy]

/unhold

[ywqzzy]

/hold

[ywqzzy]

/unhold

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[hawkingrei]

/test all

[ywqzzy]

/retest

[tiprow]

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/retest

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