fix: restrict default cluster role to authenticated only users

[fossedihelm]

What this PR does / why we need it:

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

Special notes for your reviewer:
Only authenticated users should be able to get KV CR

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Release note:

restrict default cluster role to authenticated only users

/cc @acardace @0xFelix
@xpivarc FYI

[acardace]

/approve

thank you!

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: acardace

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[0xFelix]

/lgtm

Thanks!

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Required labels detected, running phase 2 presubmits:
/test pull-kubevirt-e2e-k8s-1.27-ipv6-sig-network

[acardace]

/retest-required

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pull-kubevirt-e2e-k8s-1.27-sig-performance	a1ed7d5	link	unknown	/test pull-kubevirt-e2e-k8s-1.27-sig-performance

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