Always build eBPF; remove xtask #499

Job	Run time
build (ubuntu-latest, 1.80.1, kprobe)	1m 24s
build (ubuntu-latest, 1.80.1, kretprobe)	1m 23s
build (ubuntu-latest, 1.80.1, fentry)	1m 24s
build (ubuntu-latest, 1.80.1, fexit)	1m 23s
build (ubuntu-latest, 1.80.1, uprobe)	1m 23s
build (ubuntu-latest, 1.80.1, uretprobe)	1m 23s
build (ubuntu-latest, 1.80.1, sock_ops)	1m 24s
build (ubuntu-latest, 1.80.1, socket_filter)	1m 22s
build (ubuntu-latest, 1.80.1, sk_msg)	1m 22s
build (ubuntu-latest, 1.80.1, xdp)	1s
build (ubuntu-latest, 1.80.1, cgroup_skb)	1m 25s
build (ubuntu-latest, 1.80.1, cgroup_sockopt)	1m 25s
build (ubuntu-latest, 1.80.1, cgroup_sysctl)	1m 25s
build (ubuntu-latest, 1.80.1, classifier)	1m 23s
build (ubuntu-latest, 1.80.1, lsm)	1m 24s
build (ubuntu-latest, 1.80.1, perf_event)	1m 22s
build (ubuntu-latest, 1.80.1, raw_tracepoint)	1m 21s
build (ubuntu-latest, 1.80.1, tp_btf)	1m 22s
build (ubuntu-latest, 1.80.1, tracepoint)	1m 22s
build (macos-13, 1.80.1, kprobe)	1m 23s
build (macos-14, 1.80.1, kprobe)	1m 24s
	27m 45s

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