k8s/watchers: prevent panic when cep has no network status.
k8s/watchers: prevent panic when cep has no network status.

Signed-off-by: Tom Hadlaw <0fde47a586f3fe1b62983bf113d5231aee2fb6c9@isovalent.com>

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