Description of problem:
V2V should can generate genid in guest libvirtxml after vmx conversion if VMware guest only has vm.genidX in vmx file

Version-Release number of selected component (if applicable):
virt-v2v-1.45.3-3.el9.x86_64
libguestfs-1.46.0-1.el9.x86_64
guestfs-tools-1.46.1-4.el9.1.x86_64
libvirt-libs-7.8.0-1.el9.x86_64
qemu-img-6.1.0-5.el9.x86_64
nbdkit-1.28.0-1.el9.x86_64

How reproducible:
100%

Steps to Reproduce:
1.Create win11 x64 guests on VMware hosts, check the genid info in vmx file of some guests, found only vm.genidX is existing in vmx file, which is definitely created by VMware.

1. cat esx7.0-win11-x86_64/esx7.0-win11-x86_64.vmx |grep genid
   vm.genidX = "4860768397905562413"

OR

1. cat esx6.7-win11-x86_64/esx6.7-win11-x86_64.vmx |grep genid
   vm.genidX = "4860768397905562413"

2.Prepare a windows guest which have both vm.genid and vm.genidX in vmx file, then clone the windows guest on vsphere web client, but found only vm.genidX is existing in vmx file after cloning, which is definitely created by VMware.

1. cat esx7.0-win2022-x86_64/esx7.0-win2022-x86_64.vmx |grep genid
   vm.genid = "5935990624368300836"
   vm.genidX = "-81757490672842304"

After cloning the windows guest:

1. cat datastore1/esx7.0-win2022-clone/esx7.0-win2022-clone.vmx |grep genid
   vm.genidX = "-81757490672842304"

3.Convert above guests, v2v can't generate genid in guest libvirtxml after conversion
3.1 # virt-v2v -i vmx -it ssh ssh://root@10.73.199.217/vmfs/volumes/esx7.0-matrix/esx7.0-win11-x86_64/esx7.0-win11-x86_64.vmx -o local -os /home
3.2 # cat /home/esx7.0-win11-x86_64.xml |grep genid
nothing

3.3# virt-v2v -i vmx -it ssh ssh://root@10.73.199.217/vmfs/volumes/datastore1/esx7.0-win2022-clone/esx7.0-win2022-clone.vmx -o local -os /home
3.4 # cat /home/esx7.0-win2022-clone.xml |grep genid
nothing

Actual results:
V2V can't generate genid in guest libvirtxml after vmx conversion if VMware guest only has vm.genidX in vmx file

Expected results:
As above description

Additional info:
As bug1598348 got fixed, virt-v2v can generate genid in guest xml after vpx conversion if only vm.genidX in guest vmx