Fix gosec warnings

[denverdino]

Fix gosec warnings

The first commit contains the code fix.
The second commit suppresses a false positive.

Ⅱ. Does this pull request fix one issue?

Ⅲ. Describe how to verify it

Ⅳ. Special notes for reviews

[kruise-bot]

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[kruise-bot]

Welcome @denverdino! It looks like this is your first PR to openkruise/agents 🎉

[codecov]

Codecov Report

❌ Patch coverage is 68.18182% with 14 lines in your changes missing coverage. Please review.
✅ Project coverage is 79.84%. Comparing base (6205b42) to head (2a42082).

Files with missing lines	Patch %	Lines
.../utils/webhookutils/writer/atomic/atomic_writer.go	0.00%	9 Missing ⚠️
pkg/webhook/webhook_controller.go	0.00%	3 Missing ⚠️
pkg/agent-runtime/storage-cli/main.go	88.88%	1 Missing ⚠️
pkg/controller/sandboxset/revision.go	66.66%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #587   +/-   ##
=======================================
  Coverage   79.84%   79.84%           
=======================================
  Files         202      202           
  Lines       14795    14795           
=======================================
  Hits        11813    11813           
  Misses       2552     2552           
  Partials      430      430           

Flag	Coverage Δ
unittests	79.84% <68.18%> (ø)

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