Fix issue for cache volume

[Lyndon-Li]

Fix issue for cache volume

[codecov]

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 60.52%. Comparing base (1feaafc) to head (e72fea8).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/controller/data_download_controller.go	0.00%	1 Missing ⚠️
pkg/controller/pod_volume_restore_controller.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9487      +/-   ##
==========================================
- Coverage   60.53%   60.52%   -0.01%     
==========================================
  Files         386      386              
  Lines       36355    36355              
==========================================
- Hits        22007    22005       -2     
- Misses      12769    12770       +1     
- Partials     1579     1580       +1     

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