br: make schdule support compact

[RidRisR]

What problem does this PR solve?

Ref: pingcap/tidb#56522

What is changed and how does it work?

Modify the schdule cr to support compact

Code changes

• Has Go code change
• Has CI related scripts change

Tests

• Unit test
• E2E test
• Manual test
• No code

Side effects

• Breaking backward compatibility
• Other side effects:

Related changes

• Need to cherry-pick to the release branch
• Need to update the documentation

Release Notes

Please refer to Release Notes Language Style Guide before writing the release note.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 21.42857% with 297 lines in your changes missing coverage. Please review.

Project coverage is 62.47%. Comparing base (a16b2e8) to head (a5705ef).
Report is 23 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6033      +/-   ##
==========================================
+ Coverage   57.19%   62.47%   +5.27%     
==========================================
  Files         259      269      +10     
  Lines       33233    46817   +13584     
==========================================
+ Hits        19008    29247   +10239     
- Misses      12291    15532    +3241     
- Partials     1934     2038     +104     

Flag	Coverage Δ
e2e	46.50% <0.32%> (?)
unittest	55.72% <21.16%> (-1.48%)	⬇️

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-01-23 06:05:24.726424211 +0000 UTC m=+333652.057343610: ☑️ agreed by WangLe1321.

[RidRisR]

/run-all-tests

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: csuzhangxc, WangLe1321

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• OWNERS [WangLe1321,csuzhangxc]

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[csuzhangxc]

/run-pull-e2e-kind-serial

[RidRisR]

/run-pull-e2e-kind-basic