br: Change default check point lag limit (#51906)

[ti-chi-bot]

This is an automated cherry-pick of #51906

What problem does this PR solve?

Issue Number: ref #50803

Problem Summary:

What changed and how does it work?

This PR set the default value of 'check-point-lag-limit' to 24 hours, and also expose the paramter.

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]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: BornChanger, YuJuncen

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• OWNERS [YuJuncen]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-03-28 10:26:03.10059379 +0000 UTC m=+2149990.122840178: ☑️ agreed by BornChanger.
• 2024-03-28 10:59:56.66543776 +0000 UTC m=+2152023.687684147: ☑️ agreed by YuJuncen.