vhost-device-console: Request to add UDS backend type

Similar to vsock, in the case of the new backend type, there are two
UDSs, one for vhost-user negotiation, another one for data transfer.
(Nested backend only offers one UDS).

Can vhost-device-console do this? If yes, I would like to contribute to
this feature.

Looking forward to some feedback from people who are interested in this.
/cc @TimosAmpel @stsquad