Embed a probe into the image

[erthalion]

Modify the build pipeline to embed a probe into the image. Here we don't have to bother yet what probe is that, for testing as close as possible to the reality we could e.g. build a vanilla falco modern probe with libsinsp example and use it. This will involve similar steps, e.g. actual building of something, fetching a new dependency (libbpf) etc.

Part of #1014

[ovalenti]

@erthalion, with the use of embedded skeleton, does this task still apply ?

[erthalion]

Not for MVP, but it's still necessary for the following release (see the parent issue #1014).