Support short-lived processes

[mariomac]

Currently, Beyla polls for the running processes and instrument those matching the selection criteria, and keeps polling periodically.
That would involve that short-lived executables running every polling intervals would be ignored.
Beyla process finder should subscribe to some eBPF events (new executable, new TCP connection...) and immediately instrument them.
I emphasize the "new TCP connection..." event, because a newly created executable could not match the OPEN_PORT criteria until it internally starts the service connections.

[grcevski]

This issue request is very useful here too, so that we can correctly propagate context for short lived processes #602

[grcevski]

Related discussion for supporting TRACEPARENT env variables: open-telemetry/opentelemetry-specification#740