QE validation task for bug OCPBUGS-74586.

Bug reference: OCPBUGS-74586

Summary: machine-api-provider-openstack fails to delete primary NIC before delete instance. In cluster-api-provider-openstack v0.9.1, network ports (including primary NIC) are deleted before the instance; on OpenStack clouds that forbid detaching the primary port (policy: compute:detach primary port), machine deletion fails with 403. The fix moves port deletion after instance deletion.

QE validation scope:

• Confirm the fix (port deletion after instance deletion) is present in the build under test.
• On an OpenStack environment where primary NIC detach is restricted by policy (or equivalent), create a MachineSet and then delete the MachineSet.
• Verify the machine is deleted successfully without 403 / "Policy doesn't allow compute:detach primary port" errors.
• Document environment (OpenStack policy, CAPO/MAO version), steps, and results (pass/fail).