ticdc : Split sync_status test to reduce integration ci time

[hongyunyan]

What problem does this PR solve?

Issue Number: ref #10457

What is changed and how it works?

Split sync_status test to reduce integration ci time

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Questions

Will it cause performance regression or break compatibility?

Do you need to update user documentation, design documentation or monitoring documentation?

Release note

Please refer to [Release Notes Language Style Guide](https://pingcap.github.io/tidb-dev-guide/contribute-to-tidb/release-notes-style-guide.html) to write a quality release note.

If you don't think this PR needs a release note then fill it with `None`.

[codecov]

Codecov Report

Merging #10700 (b9cac5d) into master (31dd24f) will increase coverage by 0.0125%.
The diff coverage is n/a.

Additional details and impacted files

Components	Coverage Δ
cdc	∅ <ø> (∅)
dm	51.1970% <ø> (+0.0262%)	⬆️
engine	63.3743% <ø> (-0.0354%)	⬇️

Flag	Coverage Δ
unit	53.9048% <ø> (+0.0125%)	⬆️

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

@@               Coverage Diff                @@
##             master     #10700        +/-   ##
================================================
+ Coverage   53.8923%   53.9048%   +0.0125%     
================================================
  Files           403        403                
  Lines         63651      63651                
================================================
+ Hits          34303      34311         +8     
+ Misses        26642      26636         -6     
+ Partials       2706       2704         -2     

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: asddongmen, CharlesCheung96

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• OWNERS [CharlesCheung96,asddongmen]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-03-04 06:48:30.654785048 +0000 UTC m=+63337.677031437: ☑️ agreed by asddongmen.
• 2024-03-04 06:48:55.516561786 +0000 UTC m=+63362.538808175: ☑️ agreed by CharlesCheung96.