*: unify cleanupFunc in test

[lhy1024]

What problem does this PR solve?

Issue Number: Ref #4399

What is changed and how does it work?

Check List

Tests

• Unit test
• Integration test

Release note

None.

[ti-chi-bot]

[REVIEW NOTIFICATION]

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• bufferflies
• rleungx

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[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.07 ⚠️

Comparison is base (92772c9) 74.35% compared to head (f92e722) 74.29%.

❗ Current head f92e722 differs from pull request most recent head 72b17b9. Consider uploading reports for the commit 72b17b9 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6164      +/-   ##
==========================================
- Coverage   74.35%   74.29%   -0.07%     
==========================================
  Files         392      392              
  Lines       38205    38172      -33     
==========================================
- Hits        28406    28358      -48     
- Misses       7285     7286       +1     
- Partials     2514     2528      +14     

Flag	Coverage Δ
unittests	74.29% <ø> (-0.07%)	⬇️

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

Impacted Files	Coverage Δ
pkg/mcs/resource_manager/server/testutil.go	86.66% <ø> (ø)
pkg/mcs/tso/server/testutil.go	86.66% <ø> (ø)
pkg/utils/testutil/testutil.go	100.00% <ø> (ø)
server/testutil.go	90.62% <ø> (ø)

... and 23 files with indirect coverage changes

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[lhy1024]

/merge

[ti-chi-bot]

@lhy1024: It seems you want to merge this PR, I will help you trigger all the tests:

/run-all-tests

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[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 72b17b9