chore: set timezone for backup schedule

[ldming]

No description provided.

[codecov]

Codecov Report

Attention: 18 lines in your changes are missing coverage. Please review.

Comparison is base (ffc19e2) 68.58% compared to head (09e6f35) 68.53%.
Report is 1 commits behind head on main.

Files	Patch %	Lines
pkg/dataprotection/backup/scheduler.go	0.00%	15 Missing ⚠️
pkg/dataprotection/utils/utils.go	86.36%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6138      +/-   ##
==========================================
- Coverage   68.58%   68.53%   -0.05%     
==========================================
  Files         295      295              
  Lines       33647    33683      +36     
==========================================
+ Hits        23077    23086       +9     
- Misses       8638     8666      +28     
+ Partials     1932     1931       -1     

Flag	Coverage Δ
unittests	68.53% <51.35%> (-0.05%)	⬇️

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[ldming]

/cherry-pick release-0.8

[github-actions]

🤖 says: cherry pick action finished successfully 🎉!
See: https://github.com/apecloud/kubeblocks/actions/runs/7256747577

[ldming]

/cherry-pick release-0.7

[github-actions]

🤖 says: cherry pick action finished successfully 🎉!
See: https://github.com/apecloud/kubeblocks/actions/runs/7256750334