Find mecanism to vendor Go generated files from eBPF

[mariomac]

If we include the bpf2go generated Go files in the Git history, they can be easily vendored from other components (e.g. the otel-collector), however they are big (several MBs each one) and the Git repository will easily reach GBs after some months.

We need to find a way to let any project vendoring opentelemetry-ebpf-instrumentation to generate the BPF2Go files (or import them from another location) without having to include them in the Git history.

[MrAlias]

Related: open-telemetry/opentelemetry-go-instrumentation#1233