mgr/cephadm: Add check for virtual_interface_networks

mgr/cephadm: Add check for virtual_interface_networks

Added an additional look up for if a match with the ceph networks is not found it will check the virtual_interface_networks list from the config that will enable matching to those networks, enabling dummy IP usage as described in the docs: https://docs.ceph.com/en/reef/cephadm/services/rgw/#selecting-network-interfaces-for-the-virtual-ip.

Fixes: https://tracker.ceph.com/issues/66874
Signed-off-by: Bradley Bishop <bishopbm1@gmail.com>