k8s: Do not inherit PodCIDR for disabled address family from k8s node
k8s: Do not inherit PodCIDR for disabled address family from k8s node

The node IPs should be derived. The IPv4 external IP can be used for
encapsulation of an IPv6 only PodCIDR environment.

Signed-off-by: Thomas Graf <5f50a84c1fa3bcff146405017f36aec1a10a9e38@cilium.io>

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