embedded: remove build artifacts to reduce size
embedded: remove build artifacts to reduce size

Hitting size limits in github ci. CMake copies stuff from src/**/ to
bin/. Later we rsync it which again copies the data so lets avoid having
a lot of copies.

iovisor/bpftrace,iovisor/bpftrace,iovisor/bpftrace,iovisor/bpftrace