fix: the component controller is not notified when a backup for h-scale becomes ready

[leon-inf]

fix #8469

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 6 lines in your changes missing coverage. Please review.

Project coverage is 61.21%. Comparing base (bc7dd2f) to head (f210a75).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
controllers/apps/transformer_component_workload.go	50.00%	2 Missing and 4 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8473      +/-   ##
==========================================
- Coverage   61.22%   61.21%   -0.02%     
==========================================
  Files         351      351              
  Lines       41854    41858       +4     
==========================================
- Hits        25624    25622       -2     
- Misses      13906    13919      +13     
+ Partials     2324     2317       -7     

Flag	Coverage Δ
unittests	61.21% <50.00%> (-0.02%)	⬇️

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[leon-inf]

/cherry-pick release-1.0-beta

[github-actions]

🤖 says: cherry pick action finished successfully 🎉!
See: https://github.com/apecloud/kubeblocks/actions/runs/11889439687