schedulers: rollback the scheduler when failing to persist (#3787)

[ti-chi-bot]

This is an automated cherry-pick of #3787

What problem does this PR solve?

Try to fix #2572.

What is changed and how it works?

This PR corrects the status code and rollback the scheduler when failing to persist.

Check List

Tests

• Unit test

Related changes

• Need to cherry-pick to the release branch

Release note

Fix the issue that the scheduler may appear again even if we have already executed the delete operation

[codecov]

Codecov Report

Merging #3825 (18513e8) into release-4.0 (cd9d32c) will increase coverage by 0.11%.
The diff coverage is 68.62%.

@@               Coverage Diff               @@
##           release-4.0    #3825      +/-   ##
===============================================
+ Coverage        74.75%   74.86%   +0.11%     
===============================================
  Files              211      211              
  Lines            19961    19994      +33     
===============================================
+ Hits             14922    14969      +47     
+ Misses            3701     3695       -6     
+ Partials          1338     1330       -8     

Flag	Coverage Δ
unittests	74.86% <68.62%> (+0.11%)	⬆️

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

Impacted Files	Coverage Δ
server/api/scheduler.go	37.71% <42.85%> (+0.63%)	⬆️
server/schedulers/grant_leader.go	66.28% <50.00%> (-1.64%)	⬇️
server/cluster/coordinator.go	68.09% <66.66%> (+0.71%)	⬆️
server/schedulers/evict_leader.go	74.00% <88.88%> (+5.86%)	⬆️
server/config/persist_options.go	87.68% <100.00%> (+0.51%)	⬆️
server/id/id.go	76.19% <0.00%> (-4.77%)	⬇️
server/tso/tso.go	80.43% <0.00%> (-2.18%)	⬇️
server/server.go	74.27% <0.00%> (-0.98%)	⬇️
server/grpc_service.go	59.87% <0.00%> (+0.40%)	⬆️
... and 5 more

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[nolouch]

lgtm

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• HunDunDM
• nolouch

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[nolouch]

/merge

[ti-chi-bot]

@nolouch: 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: 768e970