scheduler: dynamically adjust the retry limit according to the operator (#4007)

[ti-chi-bot]

This is an automated cherry-pick of #4007

Signed-off-by: HunDunDM [email protected]

What problem does this PR solve?

related #3744

What is changed and how it works?

• scheduler: dynamically adjust the retry limit according to the operator

Check List

Tests

• Unit test

Code changes

Side effects

Related changes

• Need to cherry-pick to the release branch

Release note

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• HunDunDM
• disksing

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[codecov]

Codecov Report

Merging #4046 (fa778b4) into release-5.2 (6f3ff3f) will increase coverage by 0.11%.
The diff coverage is 100.00%.

@@               Coverage Diff               @@
##           release-5.2    #4046      +/-   ##
===============================================
+ Coverage        74.69%   74.81%   +0.11%     
===============================================
  Files              249      249              
  Lines            25550    25582      +32     
===============================================
+ Hits             19084    19138      +54     
+ Misses            4784     4763      -21     
+ Partials          1682     1681       -1     

Flag	Coverage Δ
unittests	74.81% <100.00%> (+0.11%)	⬆️

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

Impacted Files	Coverage Δ
server/schedulers/balance_leader.go	91.55% <100.00%> (+0.46%)	⬆️
server/schedulers/balance_region.go	89.16% <100.00%> (+0.47%)	⬆️
server/schedulers/utils.go	94.75% <100.00%> (+0.29%)	⬆️
server/statistics/hot_cache_task.go	75.00% <0.00%> (-4.17%)	⬇️
pkg/etcdutil/etcdutil.go	84.70% <0.00%> (-3.53%)	⬇️
server/schedulers/random_merge.go	60.00% <0.00%> (-3.34%)	⬇️
server/election/lease.go	94.91% <0.00%> (-1.70%)	⬇️
server/tso/tso.go	60.22% <0.00%> (-1.66%)	⬇️
server/grpc_service.go	47.45% <0.00%> (-0.23%)	⬇️
client/client.go	71.82% <0.00%> (-0.14%)	⬇️
... and 8 more

---

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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: 8cba363