WIP: Add TCX support

[rafaelroquetto]

TODO

• add the config switches to let the user pick among tc, tcx or auto
• add a function that detects support for tcx in the host kernel
  • if the support is there and the user has chosen auto, we use it, otherwise we fallback to tc
  • if the support is not there and the user has chosen tcx, we error out and bail
• cleanup Register() method from the netolly tracer
• tests
• documentation

[codecov]

Codecov Report

Attention: Patch coverage is 49.66667% with 302 lines in your changes missing coverage. Please review.

Project coverage is 72.20%. Comparing base (1192264) to head (5ddde6f).

Files with missing lines	Patch %	Lines
pkg/internal/ebpf/tcmanager/tcxmanager.go	0.00%	163 Missing ⚠️
pkg/internal/ebpf/tcmanager/netlinkmanager.go	68.49%	66 Missing and 20 partials ⚠️
pkg/internal/ebpf/tcmanager/filter.go	47.54%	24 Missing and 8 partials ⚠️
pkg/internal/netolly/agent/agent.go	70.45%	12 Missing and 1 partial ⚠️
pkg/internal/ebpf/httptracer/httptracer.go	77.77%	2 Missing and 2 partials ⚠️
pkg/internal/ebpf/tctracer/tctracer.go	82.35%	2 Missing and 1 partial ⚠️
pkg/internal/netolly/ebpf/tracer.go	92.30%	1 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (1192264) and HEAD (5ddde6f). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (1192264)	HEAD (5ddde6f)
unittests	1	0

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1478      +/-   ##
==========================================
- Coverage   81.45%   72.20%   -9.26%     
==========================================
  Files         149      151       +2     
  Lines       15253    15516     +263     
==========================================
- Hits        12425    11204    -1221     
- Misses       2228     3579    +1351     
- Partials      600      733     +133     

Flag	Coverage Δ
integration-test	58.86% <48.16%> (-0.92%)	⬇️
k8s-integration-test	60.37% <48.66%> (+0.50%)	⬆️
oats-test	33.38% <0.00%> (-0.64%)	⬇️
unittests	?

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