tests: Small extension to nat46x64 test suite to check maglev content
tests: Small extension to nat46x64 test suite to check maglev content

Small assertion that Maglev BPF map in both NAT46 and NAT64 is empty for
the IPv4 case and populated for IPv6.

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

cilium/cilium,cilium/cilium,cilium/cilium,cilium/cilium,cilium/cilium