When deploying routed networks the physical_network
attribute of ironic ports must be set, this has been
a manual task.
With this change we add configuration for the
physnet_cidr_map processing hook in ironic inspector
so that the physical_network field of ironic ports
is set automatically when introspecting nodes.
Depends-On: https://review.opendev.org/722088
Closes-Bug: #1870529
Change-Id: I7f31b9f0143507ec3c9c26efd086f0bd95ef2ce7