Floating IP port forwarding

https://docs.openstack.org/neutron/2026.1/admin/config-fip-port-forwardings.html with port ranges would be very helpful feature to implement for our customers but right now it only works in CLI. It uses port_forwarding neutron plugin.

openstack extension list --network -c Alias | grep -i port-forward
| expose-port-forwarding-in-fip |
| floating-ip-port-forwarding-description |
| floating-ip-port-forwarding-detail |
| floating-ip-port-forwarding-port-ranges |
| floating-ip-port-forwarding |