USHIFT-5476: [release-4.21] Fix bug: fix certificate rotation test time mismatch

[copejon]

Summary

• Fix certificate rotation test that fails due to TLS validation errors when system time is manipulated
• Replace Wait For MicroShift (runs oc locally) with Wait Until Greenboot Health Check Exited (runs via SSH on remote host)
• Certificates regenerated with future NotBefore times are now validated using the manipulated time on the remote host

Test plan

• Run certificate rotation test suite on release-4.21

🤖 Generated with Claude Code

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[openshift-ci-robot]

@copejon: This pull request references USHIFT-5476 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the bug to target the "4.21.z" version, but no target version was set.

Details

In response to this:

Summary

• Fix certificate rotation test that fails due to TLS validation errors when system time is manipulated
• Replace Wait For MicroShift (runs oc locally) with Wait Until Greenboot Health Check Exited (runs via SSH on remote host)
• Certificates regenerated with future NotBefore times are now validated using the manipulated time on the remote host

Test plan

• Run certificate rotation test suite on release-4.21

🤖 Generated with Claude Code

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[copejon]

/verified by ci

[openshift-ci-robot]

@copejon: This PR has been marked as verified by ci.

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[ggiguash]

The Wait Until Greenboot Health Check Exited keyword will likely exit immediately because the procedure does not change anything for greenboot.
If the intention is to wait for something, we should use Restart Greenboot And Wait For Success instead.

[ggiguash]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: copejon, ggiguash

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[copejon]

/test e2e-aws-tests

[copejon]

/label backport-risk-assessed
/verified by ci

[openshift-ci-robot]

@copejon: This PR has been marked as verified by ci.

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/label backport-risk-assessed
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[ggiguash]

/label backport-risk-assessed
/label jira/valid-bug
/verified by ci

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@ggiguash: This PR has been marked as verified by ci.

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/label backport-risk-assessed
/label jira/valid-bug
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@copejon: all tests passed!

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