remove ingress rules from cwnp spec

[mwennrich]

Currently, the spec allows setting ingress rules via cwnp.spec.ingress.

These have no effect since the firewall rules for incoming connections are applied from service.spec.loadBalancerSourceRanges.

Therefore we should the remove spec.ingress completely from the cwnp CRD.

[Gerrit91]

@mwennrich Do we still want to do this or can we close? Four years have passed. 🤓

[mwennrich]

I still can't think of any good reason, why anyone would ever set an ingress cwnp. These still have no use and no effect.