scheduler: adjust hot region config when pd-ctl return (#3982)

[ti-chi-bot]

This is an automated cherry-pick of #3982

Signed-off-by: lhy1024 [email protected]

What problem does this PR solve?

adjust hot region config when pd-ctl return，ensure that the return result of pd-ctl is consistent with the actual running scheduler

What is changed and how it works?

Check List

Tests

• Unit test

Release note

None.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• HunDunDM
• lhy1024

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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: 3562c21

[codecov]

Codecov Report

Merging #3992 (3562c21) into release-5.2 (4bf6b18) will increase coverage by 0.02%.
The diff coverage is 96.36%.

@@               Coverage Diff               @@
##           release-5.2    #3992      +/-   ##
===============================================
+ Coverage        74.62%   74.64%   +0.02%     
===============================================
  Files              248      248              
  Lines            25493    25523      +30     
===============================================
+ Hits             19024    19052      +28     
- Misses            4778     4779       +1     
- Partials          1691     1692       +1     

Flag	Coverage Δ
unittests	74.64% <96.36%> (+0.02%)	⬆️

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

Impacted Files	Coverage Δ
server/schedulers/hot_region.go	83.10% <75.00%> (-0.62%)	⬇️
pkg/mock/mockcluster/mockcluster.go	95.26% <100.00%> (+0.01%)	⬆️
server/schedulers/hot_region_config.go	92.00% <100.00%> (+2.60%)	⬆️
tests/pdctl/helper.go	100.00% <100.00%> (ø)
pkg/tempurl/tempurl.go	45.00% <0.00%> (-15.00%)	⬇️
server/region_syncer/server.go	83.08% <0.00%> (-5.89%)	⬇️
server/statistics/hot_cache_task.go	75.00% <0.00%> (-4.17%)	⬇️
server/schedulers/random_merge.go	60.00% <0.00%> (-3.34%)	⬇️
server/cluster/coordinator.go	72.91% <0.00%> (-0.68%)	⬇️
server/cluster/cluster.go	82.33% <0.00%> (-0.36%)	⬇️
... and 6 more

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