api: unify v1beta1 with v1

[mkowalski]

Is this a BUG FIX or a FEATURE ?:

Uncomment only one, leave it on its own line:

/kind bug
/kind enhancement

What this PR does / why we need it:

Special notes for your reviewer:

Release note:

API groups v1beta1 and v1 have the same content

[kubevirt-bot]

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[kubevirt-bot]

@mkowalski: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-kubernetes-nmstate-e2e-upgrade-k8s	d1b064d	link	false	/test pull-kubernetes-nmstate-e2e-upgrade-k8s
pull-kubernetes-nmstate-e2e-handler-k8s-future	d1b064d	link	false	/test pull-kubernetes-nmstate-e2e-handler-k8s-future

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[kubevirt-bot]

PR needs rebase.

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