fix(ebpf): bpftool does not build on newer kernel versions
The MR migrates to BTF to enable the eBPF programs to adapt to different kernel versions. To archive this the MR updates the bpftool to build from source v7.3.0 and the compatible libbpf version 1.3.0. The update of the libbpf tool required the changes details in Libbpf: the road to v1.0
The MR fixes #14, and is related to #15