Fix issue: backup schedule pause/unpause doesn't work

[ywk253100]

The issue is caused by the changes of controller-runtime: WithEventFilter() doesn't apply to WatchesRawSource(), this commit set Predicate for WatchesRawSource() seperatedly

Fixes #8437

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Fixes #(issue)

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 12 lines in your changes missing coverage. Please review.

Project coverage is 59.18%. Comparing base (0224d99) to head (6e34c09).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/controller/schedule_controller.go	0.00%	12 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8512      +/-   ##
==========================================
- Coverage   59.19%   59.18%   -0.01%     
==========================================
  Files         369      369              
  Lines       39270    39275       +5     
==========================================
  Hits        23245    23245              
- Misses      14561    14566       +5     
  Partials     1464     1464              

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