Issue 6786:always delete VSC regardless of the deletion policy

[Lyndon-Li]

Fix issue #6786, always delete VSC regardless of the deletion policy

[codecov]

Codecov Report

Merging #6827 (53489b1) into main (8a366c6) will increase coverage by 0.04%.
Report is 6 commits behind head on main.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #6827      +/-   ##
==========================================
+ Coverage   60.42%   60.46%   +0.04%     
==========================================
  Files         242      242              
  Lines       26029    26038       +9     
==========================================
+ Hits        15728    15745      +17     
+ Misses       9194     9187       -7     
+ Partials     1107     1106       -1     

Files Changed	Coverage Δ
pkg/exposer/csi_snapshot.go	80.56% <100.00%> (ø)
pkg/util/csi/volume_snapshot.go	90.00% <100.00%> (ø)

... and 4 files with indirect coverage changes