mcs: add store and region interface in scheduling server

[lhy1024]

What problem does this PR solve?

Issue Number: Ref #5839

What is changed and how does it work?

1. move store and region response to another pkg
2. add store and region interface in the scheduling server

Check List

Tests

• Unit test
• Manual test
  
  
  
  

Release note

None.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• CabinfeverB
• rleungx

To complete the pull request process, please ask the reviewers in the list to review by filling /cc @reviewer in the comment.
After your PR has acquired the required number of LGTMs, you can assign this pull request to the committer in the list by filling /assign @committer in the comment to help you merge this pull request.

The full list of commands accepted by this bot can be found here.

Reviewer can indicate their review by submitting an approval review.
Reviewer can cancel approval by submitting a request changes review.

[codecov]

Codecov Report

Merging #7754 (a2dbacc) into master (357ad3f) will increase coverage by 0.09%.
The diff coverage is 86.75%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7754      +/-   ##
==========================================
+ Coverage   73.52%   73.62%   +0.09%     
==========================================
  Files         430      432       +2     
  Lines       47745    47806      +61     
==========================================
+ Hits        35106    35195      +89     
+ Misses       9627     9598      -29     
- Partials     3012     3013       +1     

Flag	Coverage Δ
unittests	73.62% <86.75%> (+0.09%)	⬆️

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

[lhy1024]

/retest

[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

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.

If you have any questions about the PR merge process, please refer to pr process.

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.

[ti-chi-bot]

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

Commit hash: 6fe91d6