Update test-infra for kubernetes-security/kubernetes

[ritazh]

Goals:

• to reduce bugs in CVE patches
• to reduce delays in CVE public disclosure
• to reduce time to patch vulnerabilities

Outcome:

• determine minimum set of tests to run
• determine a set of members who will have access and ownership to maintain this test infrastructure to keep it up-to-date

cc @BenTheElder

[ameukam]

/assign @BenTheElder

/kind feature
/committee security-response
/priority backlog

[BenTheElder]

... also related: #4981

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/lifecycle stale

[xmudrii]

/remove-lifecycle stale