Description of problem:

VM is having UEFI bootloader:

~~~
oc get vm rhel8-i68a2hmbnvp4r2we -o yaml|yq '.spec.template.spec.domain.firmware'
{
  "bootloader": {
    "efi": {
      "secureBoot": false
    }
  }
}
~~~

Tried cloning the VM and the cloned VM doesn't have the UEFI and will use BIOS.

~~~
# oc get vm rhel8-i68a2hmbnvp4r2we-clone -o yaml|yq '.spec.template.spec.domain.firmware'
null
~~~


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

OpenShift Virtualization   4.12.0

How reproducible:

100%

Steps to Reproduce:

1. Create a VM with UEFI, ie spec.bootloader = efi.
2. Try cloning this VM and check the definition of the cloned VM. 
3. spec.firmware.bootloader is not copied and it will use BIOS.

Actual results:

spec.firmware.bootloader is not copied while cloning a UEFI VM

Expected results:

It should keep the bootloader configuration.

Additional info: