tests: refactor and make pd-ctl helper support mcs

[lhy1024]

What problem does this PR solve?

Issue Number: Ref #5839

What is changed and how does it work?

1. move mustPutStore, and movePutRegion out from pdtcl, because they are used by other modules.
2. make mustPutStore, and movePutRegion support to forward scheduling server.
3. replace cluster.GetServer(cluster.GetLeader()) with cluster.GetLeaderServer()

Check List

Tests

• Unit test

Release note

None.

[ti-chi-bot]

[REVIEW NOTIFICATION]

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• JmPotato

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[codecov]

Codecov Report

Merging #7120 (1873ce1) into master (5b3d017) will decrease coverage by 0.03%.
Report is 1 commits behind head on master.
The diff coverage is 60.00%.

❗ Current head 1873ce1 differs from pull request most recent head 4e4ecf2. Consider uploading reports for the commit 4e4ecf2 to get more accurate results

@@            Coverage Diff             @@
##           master    #7120      +/-   ##
==========================================
- Coverage   74.37%   74.35%   -0.03%     
==========================================
  Files         440      440              
  Lines       47209    47155      -54     
==========================================
- Hits        35114    35062      -52     
+ Misses       9007     9000       -7     
- Partials     3088     3093       +5     

Flag	Coverage Δ
unittests	74.35% <60.00%> (-0.03%)	⬇️

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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: b0593e2

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@lhy1024: Your PR was out of date, I have automatically updated it for you.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