fix: the cluster controller panic

[leon-inf]

close #8912

[codecov]

Codecov Report

Attention: Patch coverage is 52.17391% with 11 lines in your changes missing coverage. Please review.

Project coverage is 60.49%. Comparing base (be1334d) to head (fe118bf).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...lers/apps/cluster/transformer_cluster_component.go	52.17%	8 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8913      +/-   ##
==========================================
+ Coverage   60.25%   60.49%   +0.24%     
==========================================
  Files         382      382              
  Lines       46483    46496      +13     
==========================================
+ Hits        28007    28129     +122     
+ Misses      15792    15680     -112     
- Partials     2684     2687       +3     

Flag	Coverage Δ
unittests	60.49% <52.17%> (+0.24%)	⬆️

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[leon-inf]

/cherry-pick release-1.0-beta

[apecloud-bot]

🤖 says: cherry pick action finished successfully 🎉!
See: https://github.com/apecloud/kubeblocks/actions/runs/13325074165