Description of problem:
Cannot change first vNIC to virtio in "Review and create VirtualMachine"

Version-Release number of selected component (if applicable):
cnv 4.12.0

How reproducible:

Steps to Reproduce:
1. Create a new VM
2. Customize VM
3. Customize Template parameters
4. Network Interfaces
5. Edit network interface via Hamburger menu
6. Change to virtio
7. Save

Actual results: Change is rejected with 'An error occurred
Error "more than one interface is connected to a pod network in spec.template.spec.interfaces" for field "spec.template.spec.interfaces".'
Expected results: Change is accepted similar to changing a disk to virtio

Additional info: