Always build eBPF; remove xtask #497

Job	Run time
build (ubuntu-latest, 1.80.1, kprobe)	2m 0s
build (ubuntu-latest, 1.80.1, kretprobe)	1m 55s
build (ubuntu-latest, 1.80.1, fentry)	1m 52s
build (ubuntu-latest, 1.80.1, fexit)	2m 0s
build (ubuntu-latest, 1.80.1, uprobe)	1m 54s
build (ubuntu-latest, 1.80.1, uretprobe)	2m 3s
build (ubuntu-latest, 1.80.1, sock_ops)	2m 36s
build (ubuntu-latest, 1.80.1, socket_filter)	2m 0s
build (ubuntu-latest, 1.80.1, sk_msg)	2m 4s
build (ubuntu-latest, 1.80.1, xdp)	1m 54s
build (ubuntu-latest, 1.80.1, cgroup_skb)	2m 0s
build (ubuntu-latest, 1.80.1, cgroup_sockopt)	1m 59s
build (ubuntu-latest, 1.80.1, cgroup_sysctl)	2m 4s
build (ubuntu-latest, 1.80.1, classifier)	2m 37s
build (ubuntu-latest, 1.80.1, lsm)	2m 0s
build (ubuntu-latest, 1.80.1, perf_event)	1m 48s
build (ubuntu-latest, 1.80.1, raw_tracepoint)	2m 2s
build (ubuntu-latest, 1.80.1, tp_btf)	2m 25s
build (ubuntu-latest, 1.80.1, tracepoint)	1m 50s
build (macos-13, 1.80.1, kprobe)	2m 24s
build (macos-14, 1.80.1, kprobe)	5m 24s
	46m 51s

Provide feedback