Always build eBPF; remove xtask #506

Job	Run time
build (ubuntu-latest, 1.80.1, kprobe)	1m 56s
build (ubuntu-latest, 1.80.1, kretprobe)	1m 55s
build (ubuntu-latest, 1.80.1, fentry)	1m 50s
build (ubuntu-latest, 1.80.1, fexit)	2m 10s
build (ubuntu-latest, 1.80.1, uprobe)	2m 3s
build (ubuntu-latest, 1.80.1, uretprobe)	1m 55s
build (ubuntu-latest, 1.80.1, sock_ops)	2m 4s
build (ubuntu-latest, 1.80.1, socket_filter)	1m 51s
build (ubuntu-latest, 1.80.1, sk_msg)	1m 54s
build (ubuntu-latest, 1.80.1, xdp)	2m 6s
build (ubuntu-latest, 1.80.1, cgroup_skb)	2m 10s
build (ubuntu-latest, 1.80.1, cgroup_sockopt)	2m 5s
build (ubuntu-latest, 1.80.1, cgroup_sysctl)	1m 54s
build (ubuntu-latest, 1.80.1, classifier)	2m 2s
build (ubuntu-latest, 1.80.1, lsm)	1m 50s
build (ubuntu-latest, 1.80.1, perf_event)	1m 48s
build (ubuntu-latest, 1.80.1, raw_tracepoint)	1m 48s
build (ubuntu-latest, 1.80.1, tp_btf)	1m 50s
build (ubuntu-latest, 1.80.1, tracepoint)	1m 54s
build (macos-13, 1.80.1, kprobe)	2m 26s
build (macos-14, 1.80.1, kprobe)	4m 18s
	43m 49s

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