Enable staticcheck linter. Disable check for folder /pkg and /test by…

[blackpiglet]

… now.

Signed-off-by: Xun Jiang blackpiglet@gmail.com

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Please add a summary of your change

Does your change fix a particular issue?

Fixes #5734

Please indicate you've done the following:

• Accepted the DCO. Commits without the DCO will delay acceptance.
• Created a changelog file or added /kind changelog-not-required as a comment on this pull request.
• Updated the corresponding documentation in site/content/docs/main.

[codecov-commenter]

Codecov Report

Merging #5788 (955eec7) into main (71b459d) will decrease coverage by 0.15%.
The diff coverage is 40.00%.

@@            Coverage Diff             @@
##             main    #5788      +/-   ##
==========================================
- Coverage   40.76%   40.61%   -0.15%     
==========================================
  Files         244      244              
  Lines       21172    21252      +80     
==========================================
+ Hits         8631     8632       +1     
- Misses      11917    11996      +79     
  Partials      624      624              

Impacted Files	Coverage Δ
internal/hook/wait_exec_hook_handler.go	71.77% <25.00%> (ø)
internal/storage/storagelocation.go	78.78% <100.00%> (-1.77%)	⬇️
pkg/persistence/object_store.go	53.09% <0.00%> (-3.10%)	⬇️
pkg/podvolume/restorer.go	9.09% <0.00%> (-2.48%)	⬇️
pkg/util/kube/pod.go	0.00% <0.00%> (ø)
pkg/podvolume/restorer_factory.go	0.00% <0.00%> (ø)
pkg/persistence/object_store_layout.go	92.30% <0.00%> (+0.30%)	⬆️

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