CMP-4437: Add manual rule kubevirt-restrict-vnc-access-to-workloads(CIS OCP-Virt 1.12))

[taimurhafeez]

Add a manual rule for CIS OCP-Virt control 1.12 "Restrict VNC access to cluster workloads". The rule documents the audit procedure for reviewing rolebindings that grant the token.kubevirt.io:generate role, and is added to the cis-vm-extension CEL profile. Also relax build_cel_content.py to warn instead of error when a CEL profile references rules without CEL checks, allowing manual rules in CEL profiles. Update CEL documentation accordingly.

Co-Authored-By: Claude

[openshift-ci]

Hi @taimurhafeez. Thanks for your PR.

I'm waiting for a ComplianceAsCode member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work.

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[yuumasato]

/ok-to-test

[Vincent056]

LGTM — the jq rolebinding audit for token.kubevirt.io:generate matches the benchmark. One ask: rebase to drop the duplicated build-script/docs change once #14920 merges.

[rhmdnd]

We're on the right track, just needs a rebase and an update in the description text that points users to CustomRules as a way to automate this finding.

[openshift-ci]

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

Test name	Commit	Details	Required	Rerun command
ci/prow/e2e-aws-openshift-node-compliance	aed9a6b	link	false	/test e2e-aws-openshift-node-compliance

Full PR test history. Your PR dashboard.

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[Vincent056]

/lgtm

Lance's concerns were addressed.