Description of problem:
There is no warning when v2v converts guest which has pci passthrough device

Version-Release number of selected component (if applicable):
virt-v2v-2.0.0-2.el9.x86_64
libguestfs-1.48.0-2.el9.x86_64
libvirt-libs-8.1.0-1.el9.x86_64
qemu-img-6.2.0-11.el9_0.1.x86_64
nbdkit-server-1.30.1-1.el9.x86_64
libnbd-1.12.2-1.el9.x86_64

How reproducible:
100%

Steps to Reproduce:
1.Prepare a guest which has pci passthrough device on VMware
#cat Auto-esx7.0-rhel8.3-pci-passthrough/Auto-esx7.0-rhel8.3-pci-passthrough.vmx |grep pciPassthru
pciPassthru0.id = "00000:002:00.1"
pciPassthru0.deviceId = "0x1521"
pciPassthru0.vendorId = "0x8086"
pciPassthru0.systemId = "5ea99e3e-d31d-e6bc-9ae2-6c0b84ef00ee"
pciPassthru0.present = "TRUE"

2.Convert the guest from VMware by v2v

1. virt-v2v -ic vpx://root@10.73.198.169/data/10.73.199.217/?no_verify=1 -it vddk -io vddk-libdir=/home/vddk7.0.3 -io vddk-thumbprint=B5:52:1F:B4:21:09:45:24:51:32:56:F6:63:6A:93:5D:54:08:2D:78 -o rhv-upload -of qcow2 -oc https://dell-per740-22.lab.eng.pek2.redhat.com/ovirt-engine/api -op /home/rhvpasswd -os nfs_data -b ovirtmgmt -ip /home/passwd Auto-esx7.0-rhel8.3-pci-passthrough
   [ 0.0] Setting up the source: -i libvirt -ic vpx://root@10.73.198.169/data/10.73.199.217/?no_verify=1 -it vddk Auto-esx7.0-rhel8.3-pci-passthrough
   [ 1.9] Opening the source
   [ 8.0] Inspecting the source
   [ 16.1] Checking for sufficient free disk space in the guest
   [ 16.1] Converting Red Hat Enterprise Linux 8.3 (Ootpa) to run on KVM
   virt-v2v: This guest has virtio drivers installed.
   [ 85.7] Mapping filesystem data to avoid copying unused and blank areas
   [ 86.7] Closing the overlay
   [ 87.0] Assigning disks to buses
   [ 87.0] Checking if the guest needs BIOS or UEFI to boot
   [ 87.0] Setting up the destination: -o rhv-upload -oc https://dell-per740-22.lab.eng.pek2.redhat.com/ovirt-engine/api -os nfs_data
   [ 107.8] Copying disk 1/1
   █ 100% [****************************************]
   [ 323.3] Creating output metadata
   [ 333.9] Finishing off

Actual results:
As above description

Expected results:
There is a warning when v2v converts guest which has pci passthrough device

Additional info:
This is actually a regression bug because the problem has been fixed in bug1472719