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]

@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.

[you06]

/retest

[codecov]

Codecov Report

Attention: Patch coverage is 88.88889% with 10 lines in your changes missing coverage. Please review.

Please upload report for BASE (release-8.1@9679a3f). Learn more about missing BASE report.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-8.1     #60293   +/-   ##
================================================
  Coverage               ?   71.2396%           
================================================
  Files                  ?       1468           
  Lines                  ?     424161           
  Branches               ?          0           
================================================
  Hits                   ?     302171           
  Misses                 ?     101473           
  Partials               ?      20517           

Flag	Coverage Δ
unit	71.2396% <88.8888%> (?)

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

Components	Coverage Δ
dumpling	52.9656% <0.0000%> (?)
parser	∅ <0.0000%> (?)
br	41.3961% <0.0000%> (?)

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-04-09 06:17:39.254683222 +0000 UTC m=+2237152.938919317: ☑️ agreed by lcwangchao.
• 2025-04-09 06:48:20.72028318 +0000 UTC m=+2238994.404519288: ☑️ agreed by lance6716.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hawkingrei, lance6716, lcwangchao

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [hawkingrei,lance6716,lcwangchao]
• pkg/disttask/OWNERS [lance6716]
• pkg/domain/OWNERS [lance6716]
• pkg/statistics/OWNERS [hawkingrei]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[you06]

/unhold