DNM: vSphere legacy MachinePool template QA

[bandrade]

Temporary QA-only CI harness for the legacy vSphere MachinePool template scenario.

Do not merge. This draft will be closed only after test evidence and infrastructure cleanup are confirmed. It changes the focused test harness only; no product controller code is modified.

Runtime pinned by immutable digest:

• Hive MCE 5.1.0, built from upstream revision 5068da0
• OpenShift 4.17.0 x86_64 spoke, using the September 2024 installer behavior

The focused test proves:

• the ClusterDeployment failure domain has no explicit topology template;
• the existing worker MachineSet uses the legacy -rhcos-- template name, not the failure-domain name;
• a new one-replica Hive MachinePool reuses that exact full template;
• its Machine provisions, its Node becomes Ready, and the MachineSet reaches Ready 1 / Available 1;
• the temporary MachinePool and MachineSets are removed before the normal spoke teardown.

Local validation completed:

• post-install e2e package compile
• focused vSphere actuator unit tests
• shell syntax, formatting, and diff checks

This PR must remain draft and must not be merged.

[openshift-merge-bot]

Pipeline controller notification
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For optional jobs, comment /test ? to see a list of all defined jobs. To trigger manually all jobs from second stage use /pipeline required command.

This repository is configured in: LGTM mode

[openshift-ci]

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[bandrade]

/hold

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[bandrade]

/test e2e-vsphere

[openshift-ci]

@bandrade: all tests passed!

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