resource_manager: make test stable

[lhy1024]

What problem does this PR solve?

Issue Number: Ref #4399

What is changed and how does it work?

Check List

Tests

• Unit test

Release note

None.

[ti-chi-bot]

[REVIEW NOTIFICATION]

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• bufferflies
• rleungx

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[codecov]

Codecov Report

Base: 74.88% // Head: 74.79% // Decreases project coverage by -0.09% ⚠️

Coverage data is based on head (c6036fb) compared to base (2d8e79f).
Patch coverage: 57.14% of modified lines in pull request are covered.

❗ Current head c6036fb differs from pull request most recent head e8f707d. Consider uploading reports for the commit e8f707d to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6047      +/-   ##
==========================================
- Coverage   74.88%   74.79%   -0.09%     
==========================================
  Files         367      367              
  Lines       36592    36588       -4     
==========================================
- Hits        27402    27367      -35     
- Misses       6801     6824      +23     
- Partials     2389     2397       +8     

Flag	Coverage Δ
unittests	74.79% <57.14%> (-0.09%)	⬇️

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

Impacted Files	Coverage Δ
pkg/mcs/resource_manager/server/server.go	47.77% <57.14%> (-0.29%)	⬇️
pkg/tso/local_allocator.go	62.16% <0.00%> (-16.22%)	⬇️
pkg/utils/tempurl/tempurl.go	45.00% <0.00%> (-15.00%)	⬇️
pkg/storage/endpoint/meta.go	63.63% <0.00%> (-4.55%)	⬇️
pkg/tso/allocator_manager.go	61.45% <0.00%> (-4.20%)	⬇️
pkg/id/id.go	83.05% <0.00%> (-3.39%)	⬇️
pkg/election/leadership.go	75.25% <0.00%> (-2.07%)	⬇️
pkg/member/member.go	64.21% <0.00%> (-1.58%)	⬇️
server/schedule/hbstream/heartbeat_streams.go	77.77% <0.00%> (-1.02%)	⬇️
server/cluster/cluster.go	81.49% <0.00%> (-0.90%)	⬇️
... and 17 more

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[rleungx]

no need to do it

[lhy1024]

use more general function

[rleungx]

/merge

[ti-chi-bot]

@rleungx: 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: c6036fb

[ti-chi-bot]

@lhy1024: Your PR was out of date, I have automatically updated it for you.

If the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

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 ti-community-infra/tichi repository.