domain: move UpdateStatsHealthyMetrics into updateStatsWorker (#55386)

[ti-chi-bot]

This is an automated cherry-pick of #55386

What problem does this PR solve?

Issue Number: ref #54552

Problem Summary:

What changed and how does it work?

move UpdateStatsHealthyMetrics into updateStatsWorker. This way, it will not compete for resources with sync statistic. because we find that sync stats will pause for too much time to sync stats as soon as possible. it will lead to miss some stats to sync.

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

[ti-chi-bot]

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[ti-chi-bot]

@ti-chi-bot: The following tests 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/unit-test	a0c00f8	link	true	/test unit-test
idc-jenkins-ci-tidb/check_dev	a0c00f8	link	true	/test check-dev
idc-jenkins-ci-tidb/build	a0c00f8	link	true	/test build
idc-jenkins-ci-tidb/check_dev_2	a0c00f8	link	true	/test check-dev2
idc-jenkins-ci-tidb/mysql-test	a0c00f8	link	true	/test mysql-test

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