mcs: support region label http interface in scheduling server

[lhy1024]

What problem does this PR solve?

Issue Number: Ref #5839

What is changed and how does it work?

Check List

Tests

• Unit test

Release note

None.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• CabinfeverB
• rleungx

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[ti-chi-bot]

Skipping CI for Draft Pull Request.
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[codecov]

Codecov Report

Merging #7283 (9f55a95) into master (dda748a) will decrease coverage by 0.01%.
Report is 2 commits behind head on master.
The diff coverage is 58.55%.

❗ Current head 9f55a95 differs from pull request most recent head 8273793. Consider uploading reports for the commit 8273793 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7283      +/-   ##
==========================================
- Coverage   74.27%   74.27%   -0.01%     
==========================================
  Files         451      451              
  Lines       48967    48919      -48     
==========================================
- Hits        36372    36333      -39     
+ Misses       9375     9367       -8     
+ Partials     3220     3219       -1     

Flag	Coverage Δ
unittests	74.27% <58.55%> (-0.01%)	⬇️

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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

You only need to trigger /merge once, and 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.

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[ti-chi-bot]

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

Commit hash: 9f55a95

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@lhy1024: Your PR was out of date, I have automatically updated it for you.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

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