Cannot create VM from template when multiarch feature is enabled, error like below on cnv2 cluster:
admission webhook "mutatevirtualmachines.kubemacpool.io" denied the request: json: cannot unmarshal array into Go struct field VirtualMachineInstanceTemplateSpec.spec.template.spec of type v1.Devices

Note: create VM from CLI is fine, the UI seems modify the VM object.
$ oc process rhel8-server-small-u3gjyw0nt -p NAME=rhel8 | oc create -f -
virtualmachine.kubevirt.io/rhel8 created

v4.20

always on cnv2, but not occurrs on QE cluster

1.on CNV2 cluster, create vm from template via quick create button, the issue not does not happen while customize the VM
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