fix: Add TCX support to the packetparser plugin

[bugie]

Description

This change will add support for TCX in the Packetparser plugin using the ebpf link package.

This PR introduces a new environment variable to enable TCX, RETINA_FORCE_TCX_MODE. For backward compatibility this must be set to "true" to be enabled. If set to true and TCX is not found to be supported, TC is the fall back.

Related Issue

#1958

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[bugie]

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[bugie]

I am finding it difficult to reproduce the CI errors locally. Could use some guidance.

• Running make golangci-lint yields an error about m2c not found. Could not find a reference on what this is or where to obtain it.
• Earlier, running make lint was successful locally but I see CI here caught a few things and now locally, I get lint errors for an unrelated file. pkg/capture/crd_to_job.go:740:1: The line is 134 characters long, which exceeds the maximum of 120 characters. Seems a bit inconsistent.

Could I get some help with how to run CI locally to reproduce that is run via Github Actions to help avoid this commit noise? I am running Ubuntu 24.04

[anubhabMajumdar]

Hi @bugie Thanks for raising the PR. With TCX available in newer kernels, adding support for it a great idea.
I envision that TCX will be the default in near future, with TC as fallback only when support in missing on the node. With that in mind, let's refactor this PR to add support for long term usage.

1. We should start by adding a new configuration for using TCX, something like EnableTCX: auto/always/off . auto can be the default option. We should add check for TCX support and based on that use TCX or TC.
2. We shouldn't add the support in existing packetparser plugin. Instead, let's add a new packetparser plugin for TCX. Based on above config and kernel version, etc, during runtime with packetparser_TC/TCX gets activated.
3. We can move the parse function in C code to common lib and use it for both plugin.