Description of problem:
Can't clone the VM with instance type. vmclone object stuck in `RestoreInProgress` state:

> $ oc get vmclone
> NAME PHASE SOURCEVIRTUALMACHINE TARGETVIRTUALMACHINE
> clone-instancetype RestoreInProgress vm-fedora-csmall vm-fedora-csmall-clone

and there is an error message about conflict in vmrestore:

> $ oc describe vmrestore
> ---- ------ ---- ---- -------
> Warning VirtualMachineRestoreError 2m34s (x17 over 8m7s) restore-controller VirtualMachineRestore encountered error admission webhook "virtualmachine-validator.kubevirt.io" denied the request: VM field conflicts with selected Instancetype, VM field conflicts with selected Instancetype, VM field conflicts with selected Instancetype, VM field conflicts with selected Instancetype

The used Instancetype:

apiVersion: instancetype.kubevirt.io/v1beta1
kind: VirtualMachineInstancetype
metadata:
creationTimestamp: "2023-07-31T20:31:42Z"
generation: 1
name: csmall
namespace: default
resourceVersion: "381097"
uid: d22d6d0e-6eb0-4f7a-9ab9-0066cd677a43
spec:
cpu:
guest: 1
memory:
guest: 1Gi

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

How reproducible:

Steps to Reproduce:
1. create instancetype
2. create VM with this instancetype
3. clone VM

Actual results:
VM failed to clone

Expected results:
VM successfully cloned

Additional info: