chore: remove the backupPolicy conflict event for cluster

[wangyelei]

No description provided.

[apecloud-bot]

Auto Cherry-pick Instructions

Usage:
  - /nopick: Not auto cherry-pick when PR merged.
  - /pick: release-x.x [release-x.x]: Auto cherry-pick to the specified branch when PR merged.

Example:
  - /nopick
  - /pick release-1.0

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 59.71%. Comparing base (1a52cc5) to head (c25a9d3).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9496      +/-   ##
==========================================
+ Coverage   59.51%   59.71%   +0.19%     
==========================================
  Files         517      517              
  Lines       55432    55434       +2     
==========================================
+ Hits        32993    33101     +108     
+ Misses      19471    19369     -102     
+ Partials     2968     2964       -4     

Flag	Coverage Δ
unittests	59.71% <100.00%> (+0.19%)	⬆️

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[apecloud-bot]

/cherry-pick release-1.0

[apecloud-bot]

🤖 says: cherry pick action finished successfully 🎉!
See: https://github.com/apecloud/kubeblocks/actions/runs/15962711545