setupHost in net.go should be adjusted to also handle host interface provisioning for macvlan backend

Reminder2: vlan/vxlan support for delegated backends should be refactored to be generic, rather than requiring code per-backend
Similarly to how need for DANM IPAM is expressed

The review contains the generalization of how IP route provisioning is handled within DANM.

Previously IP routes were only provisioned into a container's netNS if the NEtworkType of the related DanmNet was "ipvlan".

The related code was refactored to be generic, and is now invoked from cnidel after a delegated CNI created an interface.
As a result, DANM can now provision both generic, and policy-based IP routes for both static, and dynamic-level backends.

Actually there is not much separating the two after this change :)

The recent refactoring includes:

• DanmNet validation regardless of NetworkType
• DanmEp format is now commonly used throughout the whole project when provisioning, or deleting interfaces; both for delegated, and non-delegated use-cases.
  The common format will enable common enhancements implemented in the future

Change is now functional tested, all newly added functionalities work.
After this review it will be possible to:

• provision MACVLAN interfaces purely from the DanmNet API
• all supported options work with MACVLAN too, IPv6, static IP allocation, routes, proutes, vlan, and vxlan included
• all backends, both dynamic and static can now have default IP routes provisioned based on the DanmNet API
• all backends, both dynamic and static can now have Pod-level policy-based IP routes provisioned into their routing tables

Only documentation remains, and we are good to go!