bpf: improve overlay build permutation coverage
bpf: improve overlay build permutation coverage

Given bpf_overlay is similarly serving BPF NodePort like bpf_netdev does,
improve coverage so we can easier spot any build issues.

Signed-off-by: Daniel Borkmann <3d0f3b9ddcacec30c4008c5e030e6c13a478cb4f@iogearbox.net>

tgraf/cilium,cilium-team/cilium,tgraf/cilium,tgraf/cilium,cilium/cilium,tgraf/cilium,tklauser/cilium,michi-covalent/cilium,michi-covalent/cilium,tklauser/cilium,tgraf/cilium,cilium/cilium,cilium/cilium,tklauser/cilium,cilium/cilium,tgraf/cilium,michi-covalent/cilium,michi-covalent/cilium,tklauser/cilium,cilium-team/cilium,cilium/cilium,michi-covalent/cilium,tklauser/cilium