feat: add option to disable TCX in Cilium agent configuration

[l1b0k]

Currently, the trunk network mode relies on tc filter for VLAN processing and does not support TCX at present.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 61.85%. Comparing base (41bab9b) to head (a65bdb7).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #947      +/-   ##
==========================================
+ Coverage   61.83%   61.85%   +0.01%     
==========================================
  Files         131      131              
  Lines       16180    16181       +1     
==========================================
+ Hits        10005    10008       +3     
+ Misses       4995     4993       -2     
  Partials     1180     1180              

Flag	Coverage Δ
unittests	61.85% <100.00%> (+0.01%)	⬆️

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