metrics: optimize the store state filter metrics (#2946)

[ti-srebot]

cherry-pick #2946 to release-4.0

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What problem does this PR solve?

Close #2933.

What is changed and how it works?

This PR records the detailed reason in the filter type. After this PR:

Check List

Tests

• Manual test

Release note

[disksing]

It looks like this cherry-pick comes with many other commits (some of them may include behaviour changes).

[AndreMouche]

/lgtm

[ti-chi-bot]

@AndreMouche: adding LGTM is restricted to reviewers in list.

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/lgtm

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[codecov]

Codecov Report

Merging #3100 (cef4b09) into release-4.0 (703471b) will increase coverage by 0.33%.
The diff coverage is 82.75%.

@@               Coverage Diff               @@
##           release-4.0    #3100      +/-   ##
===============================================
+ Coverage        74.77%   75.10%   +0.33%     
===============================================
  Files              209      209              
  Lines            19594    19621      +27     
===============================================
+ Hits             14651    14737      +86     
+ Misses            3617     3553      -64     
- Partials          1326     1331       +5     

Flag	Coverage Δ
unittests	75.10% <82.75%> (+0.33%)	⬆️

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

Impacted Files	Coverage Δ
server/schedule/filter/filters.go	82.40% <75.60%> (-3.26%)	⬇️
server/schedule/checker/rule_checker.go	82.31% <100.00%> (ø)
server/schedule/operator/builder.go	92.57% <100.00%> (ø)
server/schedule/region_scatterer.go	84.13% <100.00%> (ø)
server/schedulers/adjacent_region.go	73.93% <100.00%> (ø)
server/schedulers/balance_leader.go	91.50% <100.00%> (ø)
server/schedulers/balance_region.go	84.80% <100.00%> (ø)
server/schedulers/evict_leader.go	68.71% <100.00%> (ø)
server/schedulers/hot_region.go	80.76% <100.00%> (ø)
server/schedulers/label.go	70.37% <100.00%> (ø)
... and 17 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]

@nolouch: /merge in this pull request requires 2 /lgtm.

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/merge

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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]

@nolouch: /merge in this pull request requires 2 /lgtm.

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/merge

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[HunDunDM]

/merge

[ti-chi-bot]

@HunDunDM: It seems you want to merge this PR, I will help you trigger all the tests:

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[ti-chi-bot]

@HunDunDM: /merge in this pull request requires 2 /lgtm.

In response to this:

/merge

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[HunDunDM]

/merge

[ti-chi-bot]

@HunDunDM: 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: cef4b09

[ti-chi-bot]

@ti-srebot: Your PR has out-of-dated, I have automatically updated it for you.

At the same time I will also trigger all tests for you:

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