Previously, the network policy(based on ipBlock) is created during k8s
orchestrator initialization to restrict the function pod access from
However, the network policy is actually designed to use inside the k8s
cluster, it doesn't make sense to define the network policy in order to
restrict the inbound traffic from outside. A typical example is when
Calico is used as network plugin in the k8s cluster, the source IP
address from the pod's perspective is coming from the worker node rather
than the original IP address of outside.
We need to remove the network policy creation for now and leave that
part of security concerns to the future design.
The config option `CONF.kubernetes.trusted_cidrs` is deprecated for