metrics: rename Operator limit

[lhy1024]

Signed-off-by: lhy1024 admin@liudos.us

What problem does this PR solve?

Operator limit is difficult to understand

What is changed and how it works?

Rename it

Check List

Tests

• No code

Release note

 None.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• HunDunDM
• bufferflies

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[codecov]

Codecov Report

Merging #4605 (e160a59) into master (f605a2c) will increase coverage by 0.11%.
The diff coverage is n/a.

❗ Current head e160a59 differs from pull request most recent head 45b3f37. Consider uploading reports for the commit 45b3f37 to get more accurate results

@@            Coverage Diff             @@
##           master    #4605      +/-   ##
==========================================
+ Coverage   74.69%   74.81%   +0.11%     
==========================================
  Files         279      277       -2     
  Lines       27627    27627              
==========================================
+ Hits        20637    20670      +33     
+ Misses       5137     5109      -28     
+ Partials     1853     1848       -5     

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

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

Impacted Files	Coverage Δ
pkg/errs/errs.go	75.00% <0.00%> (-25.00%)	⬇️
server/api/trend.go	66.19% <0.00%> (-7.05%)	⬇️
server/region_syncer/server.go	81.45% <0.00%> (-3.98%)	⬇️
server/election/leadership.go	78.35% <0.00%> (-2.07%)	⬇️
server/member/member.go	65.24% <0.00%> (-1.61%)	⬇️
server/region_syncer/client.go	83.59% <0.00%> (-1.57%)	⬇️
server/schedule/operator/step.go	73.09% <0.00%> (-1.10%)	⬇️
pkg/btree/btree.go	87.37% <0.00%> (-0.76%)	⬇️
server/grpc_service.go	51.44% <0.00%> (-0.39%)	⬇️
server/core/basic_cluster.go	91.47% <0.00%> (-0.19%)	⬇️
... and 20 more

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[lhy1024]

/rebuild

[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: 27d4554