Always build eBPF; remove xtask #500

Job	Run time
build (ubuntu-latest, 1.80.1, kprobe)	1m 1s
build (ubuntu-latest, 1.80.1, kretprobe)	54s
build (ubuntu-latest, 1.80.1, fentry)	49s
build (ubuntu-latest, 1.80.1, fexit)	55s
build (ubuntu-latest, 1.80.1, uprobe)	51s
build (ubuntu-latest, 1.80.1, uretprobe)	52s
build (ubuntu-latest, 1.80.1, sock_ops)	58s
build (ubuntu-latest, 1.80.1, socket_filter)	49s
build (ubuntu-latest, 1.80.1, sk_msg)	52s
build (ubuntu-latest, 1.80.1, xdp)	50s
build (ubuntu-latest, 1.80.1, cgroup_skb)	51s
build (ubuntu-latest, 1.80.1, cgroup_sockopt)	50s
build (ubuntu-latest, 1.80.1, cgroup_sysctl)	50s
build (ubuntu-latest, 1.80.1, classifier)	50s
build (ubuntu-latest, 1.80.1, lsm)	1m 4s
build (ubuntu-latest, 1.80.1, perf_event)	54s
build (ubuntu-latest, 1.80.1, raw_tracepoint)	55s
build (ubuntu-latest, 1.80.1, tp_btf)	51s
build (ubuntu-latest, 1.80.1, tracepoint)	49s
build (macos-13, 1.80.1, kprobe)	3m 13s
build (macos-14, 1.80.1, kprobe)	1m 20s
	21m 18s

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