Always build eBPF; remove xtask #508

Job	Run time
build (ubuntu-latest, 1.80.1, kprobe)	2m 50s
build (ubuntu-latest, 1.80.1, kretprobe)	2m 41s
build (ubuntu-latest, 1.80.1, fentry)	2m 56s
build (ubuntu-latest, 1.80.1, fexit)	2m 39s
build (ubuntu-latest, 1.80.1, uprobe)	2m 50s
build (ubuntu-latest, 1.80.1, uretprobe)	2m 50s
build (ubuntu-latest, 1.80.1, sock_ops)	2m 46s
build (ubuntu-latest, 1.80.1, socket_filter)	2m 36s
build (ubuntu-latest, 1.80.1, sk_msg)	2m 39s
build (ubuntu-latest, 1.80.1, xdp)	2m 2s
build (ubuntu-latest, 1.80.1, cgroup_skb)	2m 55s
build (ubuntu-latest, 1.80.1, cgroup_sockopt)	2m 50s
build (ubuntu-latest, 1.80.1, cgroup_sysctl)	2m 47s
build (ubuntu-latest, 1.80.1, classifier)	2m 46s
build (ubuntu-latest, 1.80.1, lsm)	2m 39s
build (ubuntu-latest, 1.80.1, perf_event)	2m 42s
build (ubuntu-latest, 1.80.1, raw_tracepoint)	2m 35s
build (ubuntu-latest, 1.80.1, tp_btf)	2m 43s
build (ubuntu-latest, 1.80.1, tracepoint)	2m 36s
build (macos-13, 1.80.1, kprobe)	4m 7s
build (macos-14, 1.80.1, kprobe)	2m 23s
	57m 52s

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