chore: the config template referenced might be empty

[leon-inf]

No description provided.

[shanshanying]

after overriding, we should make sure each tempatehas non-emptytemplateRef`.

[codecov]

Codecov Report

Attention: Patch coverage is 58.82353% with 7 lines in your changes missing coverage. Please review.

Project coverage is 60.46%. Comparing base (24892e7) to head (733caf3).
Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
controllers/apps/configuration/config_util.go	0.00%	6 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8880      +/-   ##
==========================================
+ Coverage   60.15%   60.46%   +0.30%     
==========================================
  Files         382      382              
  Lines       46331    46344      +13     
==========================================
+ Hits        27871    28021     +150     
+ Misses      15784    15650     -134     
+ Partials     2676     2673       -3     

Flag	Coverage Δ
unittests	60.46% <58.82%> (+0.30%)	⬆️

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[leon-inf]

after overriding, we should make sure each tempatehas non-emptytemplateRef`.

Done.

[leon-inf]

/cherry-pick release-1.0-beta

[apecloud-bot]

🤖 says: cherry pick action finished successfully 🎉!
See: https://github.com/apecloud/kubeblocks/actions/runs/13198147911