infoschema,metrics: use tidb_tikvclient_request_seconds_bucket to get the .999 cop req duration instead

[XuHuaiyu]

What problem does this PR solve?

Issue Number: Ref #59815

Problem Summary:
The TiDB -> Distsql -> Coprocessor Seconds 999 panel uses the tidb_tikvclient_cop_duration_seconds_bucket metric to gather data, but this metric is redundant. We can use tidb_tikvclient_request_seconds_bucket to obtain the same data. Therefore, tidb_tikvclient_cop_duration_seconds_bucket can be removed to save storage space.

client-go PR tikv/client-go#1602

What changed and how does it work?

Before:

After:

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 @XuHuaiyu. Thanks for your PR.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.9161%. Comparing base (57315c9) to head (925aa9e).
Report is 48 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #59845        +/-   ##
================================================
+ Coverage   73.1389%   74.9161%   +1.7772%     
================================================
  Files          1708       1754        +46     
  Lines        471809     479950      +8141     
================================================
+ Hits         345076     359560     +14484     
+ Misses       105518      97778      -7740     
- Partials      21215      22612      +1397     

Flag	Coverage Δ
integration	48.8344% <ø> (?)
unit	72.3533% <ø> (+0.0085%)	⬆️

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Components	Coverage Δ
dumpling	52.6910% <ø> (ø)
parser	∅ <ø> (∅)
br	62.3042% <ø> (+15.0910%)	⬆️

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[zimulala]

LGTM

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-03-03 03:34:29.413480874 +0000 UTC m=+239782.542400618: ☑️ agreed by zimulala.
• 2025-03-13 14:38:05.086143687 +0000 UTC m=+453040.691672614: ☑️ agreed by lance6716.

[tiprow]

@XuHuaiyu: 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
fast_test_tiprow	194c0d5	link	true	/test fast_test_tiprow

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lance6716, tangenta, zimulala

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[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.5: #60390.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.1: #60391.
But this PR has conflicts, please resolve them!

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.1: #60392.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-6.5: #60393.
But this PR has conflicts, please resolve them!

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.5: #60394.