Description of problem:
Now there is a validation for the VM hostname, if there is an uppercase in the name, it prompt that it will convert the uppercase to lowercase. It work for the VM name, but not for the datavolume.

"""
Events:
  Type     Reason                  Age                From                       Message
  ----     ------                  ----               ----                       -------
  Warning  FailedDataVolumeCreate  30s (x15 over 1m)  virtualmachine-controller  Error creating DataVolume rootdisk-testurl1A: DataVolume.cdi.kubevirt.io "rootdisk-testurl1A" is invalid: metadata.name: Invalid value: "rootdisk-testurl1A": a DNS-1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character (e.g. 'example.com', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*')
"""

Version-Release number of selected component (if applicable):
kubevirt-web-ui:v1.4.0-5

How reproducible:


Steps to Reproduce:
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Actual results:


Expected results:


Additional info: