Always build eBPF; remove xtask #496

Job	Run time
build (ubuntu-latest, 1.80.1, kprobe)	2m 54s
build (ubuntu-latest, 1.80.1, kretprobe)	2m 56s
build (ubuntu-latest, 1.80.1, fentry)	2m 49s
build (ubuntu-latest, 1.80.1, fexit)	2m 52s
build (ubuntu-latest, 1.80.1, uprobe)	2m 54s
build (ubuntu-latest, 1.80.1, uretprobe)	3m 1s
build (ubuntu-latest, 1.80.1, sock_ops)	3m 4s
build (ubuntu-latest, 1.80.1, socket_filter)	2m 56s
build (ubuntu-latest, 1.80.1, sk_msg)	1m 48s
build (ubuntu-latest, 1.80.1, xdp)	2m 17s
build (ubuntu-latest, 1.80.1, cgroup_skb)	3m 1s
build (ubuntu-latest, 1.80.1, cgroup_sockopt)	2m 56s
build (ubuntu-latest, 1.80.1, cgroup_sysctl)	3m 9s
build (ubuntu-latest, 1.80.1, classifier)	2m 59s
build (ubuntu-latest, 1.80.1, lsm)	2m 48s
build (ubuntu-latest, 1.80.1, perf_event)	2m 50s
build (ubuntu-latest, 1.80.1, raw_tracepoint)	2m 52s
build (ubuntu-latest, 1.80.1, tp_btf)	3m 8s
build (ubuntu-latest, 1.80.1, tracepoint)	2m 59s
build (macos-13, 1.80.1, kprobe)	9m 33s
build (macos-14, 1.80.1, kprobe)	2m 40s
	1h 6m 26s

Provide feedback