metrics: add circuit breaker metrics

[rleungx]

What problem does this PR solve?

Issue Number: ref #58780

Problem Summary:

What changed and how does it work?

Check List

Tests

• Manual test (add detailed scripts or steps below)

Release note

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None

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[ti-chi-bot]

@rleungx: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
idc-jenkins-ci-tidb/check_dev	ae1e097	link	true	/test check-dev

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.0573%. Comparing base (002a1a7) to head (ae1e097).
Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##             master     #59338   +/-   ##
===========================================
  Coverage   73.0573%   73.0573%           
===========================================
  Files          1690       1690           
  Lines        467062     467062           
===========================================
  Hits         341223     341223           
  Misses       104874     104874           
  Partials      20965      20965           

Flag	Coverage Δ
unit	72.2404% <ø> (ø)

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Components	Coverage Δ
dumpling	52.6910% <ø> (ø)
parser	∅ <ø> (∅)
br	45.4660% <ø> (ø)