koordlet: fix unsafe conversion in net_cls

[saintube]

Ⅰ. Describe what this PR does

• koordlet: Fix the unsafe conversion in the tc runtime hook plugin.

Ⅱ. Does this pull request fix one issue?

Resolve code scanning alerts #40, #41,

Ⅲ. Describe how to verify it

Ⅳ. Special notes for reviews

V. Checklist

• I have written necessary docs and comments
• I have added necessary unit tests and integration tests
• All checks passed in make test

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 16 lines in your changes missing coverage. Please review.

Project coverage is 67.89%. Comparing base (0fa719d) to head (9b35d88).
Report is 1 commits behind head on main.

Files	Patch %	Lines
pkg/koordlet/resourceexecutor/cgroup.go	0.00%	10 Missing ⚠️
pkg/koordlet/resourceexecutor/reader.go	0.00%	4 Missing ⚠️
pkg/koordlet/runtimehooks/hooks/tc/rule.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2173      +/-   ##
==========================================
- Coverage   67.90%   67.89%   -0.01%     
==========================================
  Files         443      443              
  Lines       41957    41967      +10     
==========================================
+ Hits        28490    28495       +5     
- Misses      11010    11018       +8     
+ Partials     2457     2454       -3     

Flag	Coverage Δ
unittests	67.89% <0.00%> (-0.01%)	⬇️

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[koordinator-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jasonliu747

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• pkg/koordlet/OWNERS [jasonliu747]

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[zwzhang0107]

/lgtm