replica_strategy:speed up and reduce the complexity of selectStore to O(n)

[AndreMouche]

What problem does this PR solve?

Issue Number: Close #5143

Check List

Tests

• Unit test

Release note

None.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• CabinfeverB
• bufferflies

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[codecov]

Codecov Report

Merging #5144 (b9d2c51) into master (5d744d3) will decrease coverage by 0.14%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #5144      +/-   ##
==========================================
- Coverage   75.69%   75.55%   -0.15%     
==========================================
  Files         309      309              
  Lines       30586    30598      +12     
==========================================
- Hits        23153    23119      -34     
- Misses       5437     5471      +34     
- Partials     1996     2008      +12     

Flag	Coverage Δ
unittests	75.55% <100.00%> (-0.15%)	⬇️

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

Impacted Files	Coverage Δ
server/schedule/checker/replica_strategy.go	88.63% <100.00%> (-0.26%)	⬇️
server/schedule/filter/candidates.go	100.00% <100.00%> (ø)
server/tso/local_allocator.go	68.91% <0.00%> (-9.46%)	⬇️
...erver/config/service_middleware_persist_options.go	91.66% <0.00%> (-8.34%)	⬇️
server/region_syncer/server.go	83.15% <0.00%> (-4.35%)	⬇️
server/schedulers/random_merge.go	60.00% <0.00%> (-3.34%)	⬇️
client/base_client.go	79.38% <0.00%> (-2.58%)	⬇️
server/tso/allocator_manager.go	62.72% <0.00%> (-2.50%)	⬇️
server/tso/tso.go	69.49% <0.00%> (-1.70%)	⬇️
server/server.go	72.89% <0.00%> (-1.50%)	⬇️
... and 14 more

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[CabinfeverB]

If we wanted to implement a retry mechanism in ReplicaStrategy, this method may be not useful

[bufferflies]

rest LGTM

[nolouch]

/merge

[ti-chi-bot]

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/run-all-tests

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[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: d94e80a