metrics: add metrics for priority resource control

[glorv]

What problem does this PR solve?

Issue Number: close #56368

Problem Summary:

What changed and how does it work?

NOTE: some new metrics depends on the change of tikv/tikv#17590

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No need to test

  • I checked and no code files have been changed.

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[tiprow]

Hi @glorv. Thanks for your PR.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.6704%. Comparing base (b520f61) to head (e4a63ff).
Report is 15 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #56374        +/-   ##
================================================
+ Coverage   73.3867%   75.6704%   +2.2836%     
================================================
  Files          1620       1623         +3     
  Lines        447041     450165      +3124     
================================================
+ Hits         328069     340642     +12573     
+ Misses        98877      89022      -9855     
- Partials      20095      20501       +406     

Flag	Coverage Δ
integration	49.4227% <ø> (?)
unit	72.7979% <ø> (+0.3197%)	⬆️

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

Components	Coverage Δ
dumpling	52.9478% <ø> (ø)
parser	∅ <ø> (∅)
br	52.4459% <ø> (+6.9166%)	⬆️

[glorv]

/ok-to-test

[glorv]

/test fast_test_tiprow

[ti-chi-bot]

@glorv: The specified target(s) for /test were not found.
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[Connor1996]

LGTM

[ti-chi-bot]

@Connor1996: adding LGTM is restricted to approvers and reviewers in OWNERS files.

In response to this:

LGTM

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[glorv]

/approve

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-09-27 08:36:59.788213676 +0000 UTC m=+1814289.528637615: ☑️ agreed by nolouch.
• 2024-09-29 02:45:14.45397894 +0000 UTC m=+150069.874191950: ☑️ agreed by JmPotato.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Connor1996, glorv, hawkingrei, JmPotato, nolouch

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[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.5: #56395.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.1: #56396.