infosync: refactor server config into dynamic and static sections (#58473)

[ti-chi-bot]

This is an automated cherry-pick of #58473

What problem does this PR solve?

Issue Number: close #58405

Problem Summary:

The labels of TiDB are stored within a static structure, meanwhile TiDB have update-label API. Before this PR, the way TiDB handles the mutations of labels have data-race risk.

What changed and how does it work?

Refactor the ServerInfo into static and dynamic sections and fix the data race by atomic operations.

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]

This cherry pick PR is for a release branch and has not yet been approved by triage owners.
Adding the do-not-merge/cherry-pick-not-approved label.

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[ti-chi-bot]

@you06 This PR has conflicts, I have hold it.
Please resolve them or ask others to resolve them, then comment /unhold to remove the hold label.

[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/build	9181d5e	link	true	/test build
idc-jenkins-ci-tidb/mysql-test	9181d5e	link	true	/test mysql-test
idc-jenkins-ci-tidb/check_dev	9181d5e	link	true	/test check-dev
idc-jenkins-ci-tidb/unit-test	9181d5e	link	true	/test unit-test
idc-jenkins-ci-tidb/check_dev_2	9181d5e	link	true	/test check-dev2

Full PR test history. Your PR dashboard.

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[ti-chi-bot]

This pull request is closed because its related version has closed automatic cherry-picking.
If it's still needed, you can reopen it or just regenerate it using bot,
see:

https://prow.tidb.net/command-help#cherrypick
https://book.prow.tidb.net/#/plugins/cherrypicker