policy: support turn-off policy

[l1b0k]

always chain cilium cni if policy use ebpf

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 22.98%. Comparing base (47301e6) to head (a07fcc4).

Files	Patch %	Lines
cmd/terway-cli/cni.go	0.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #632      +/-   ##
==========================================
- Coverage   23.18%   22.98%   -0.21%     
==========================================
  Files          62       62              
  Lines        6490     6487       -3     
==========================================
- Hits         1505     1491      -14     
- Misses       4749     4758       +9     
- Partials      236      238       +2     

Flag	Coverage Δ
unittests	22.98% <0.00%> (-0.21%)	⬇️

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