Add passt package to ro virt-handler image (a later ticket will optimize it to only extract passt-repair from the rpm)

Launch a goroutine to call passt-repair, in 2 designated locations. Protected by FG, and only if spec.interface.binding!=nil.

Pass an argument with the VMIs libvirt volume path, where passt creates the unix socket.

Return from gorutine upon failure or timeout.

passt regression testing should pass.

Dedicated seamless migration test not included in this ticket.