[RFC] better naming for Azure MANA network devices (#34255)

[RFC] better naming for Azure MANA network devices (#34255)

The Azure MANA folks would like the PCI domain to be suppressed from
naming network interfaces. Let's introduce a somewhat generic way to do
this, without hardcoding anything to Azure.

Specifically: we'll ship a new hwdb entry that sets a new
ID_NET_NAME_INCLUDE_DOMAIN=0 property on relevant MANA devices. Then we
make net_id look for that property, and if it is set we simply suppress
the PCI domain.

(Untested as of now, needs feedback from Azure MANA folks that this
actually works and does what is requested here).