Issue 8394: move closeDataPath outside callbacks

[Lyndon-Li]

Fix issue #8394, don't call closeDataPath in VGDP callbacks, otherwise, the VGDP cleanup will hang

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 9 lines in your changes missing coverage. Please review.

Project coverage is 58.95%. Comparing base (1fbd22f) to head (e5d6c48).
Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/controller/pod_volume_backup_controller.go	0.00%	5 Missing ⚠️
pkg/controller/pod_volume_restore_controller.go	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8395      +/-   ##
==========================================
- Coverage   58.96%   58.95%   -0.02%     
==========================================
  Files         367      367              
  Lines       38895    38902       +7     
==========================================
  Hits        22933    22933              
- Misses      14500    14507       +7     
  Partials     1462     1462              

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