scheduler: use move-hot-write-leader operator (#7852)

[ti-chi-bot]

This is an automated cherry-pick of #7852

What problem does this PR solve?

Issue Number: Close #7848

What is changed and how does it work?

Check List

Tests

• Unit test
• manual test with 6 tikv
  • tpcc
    
  • oltp_read_write
    
  • oltp_write_only
    
  • oltp_update_index
    
  • oltp_update_non_index
    
  • oltp_insert
    

Release note

None.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• HuSharp
• lhy1024

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[codecov]

Codecov Report

Attention: Patch coverage is 90.90909% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 74.51%. Comparing base (7eb188c) to head (0c2952d).
Report is 1 commits behind head on release-7.5.

❗ Current head 0c2952d differs from pull request most recent head 98a4645

Please upload reports for the commit 98a4645 to get more accurate results.

Additional details and impacted files

@@               Coverage Diff               @@
##           release-7.5    #8144      +/-   ##
===============================================
- Coverage        74.62%   74.51%   -0.11%     
===============================================
  Files              444      444              
  Lines            48237    48255      +18     
===============================================
- Hits             35996    35957      -39     
- Misses            9056     9101      +45     
- Partials          3185     3197      +12     

Flag	Coverage Δ
unittests	74.51% <90.90%> (-0.11%)	⬇️

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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: 98a4645