[WIP] Stabilize TNF node replacement test with graceful standby shutdown

[clobrano]

Use pcs standby mode to gracefully stop resources on the target node
before VM destruction. This prevents Pacemaker from attempting fencing
when the node disappears and provides a cleaner shutdown sequence.

Key changes:

• Put target node in standby mode before destroying VM
• Wait for etcd to stop on target node rather than surviving node
• Add PcsNodeStandby/PcsNodeUnstandby helper functions
• Increase cluster operators health check timeout to 15 minutes
• Rename provisioning bridge constant from ostestpr to tnfpr
• Refactor waitForEtcdResourceToStop to accept explicit node parameters

[openshift-ci-robot]

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[openshift-ci]

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: clobrano
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[clobrano]

/payload-job periodic-ci-openshift-release-master-nightly-4.22-e2e-metal-ovn-two-node-fencing-recovery-techpreview

[openshift-ci]

@clobrano: trigger 1 job(s) for the /payload-(with-prs|job|aggregate|job-with-prs|aggregate-with-prs) command

• periodic-ci-openshift-release-master-nightly-4.22-e2e-metal-ovn-two-node-fencing-recovery-techpreview

See details on https://pr-payload-tests.ci.openshift.org/runs/ci/949da370-fb80-11f0-88d3-7535f9ddec9d-0

[clobrano]

/payload-job periodic-ci-openshift-release-master-nightly-4.22-e2e-metal-ovn-two-node-fencing-recovery-techpreview

[openshift-ci]

@clobrano: trigger 1 job(s) for the /payload-(with-prs|job|aggregate|job-with-prs|aggregate-with-prs) command

• periodic-ci-openshift-release-master-nightly-4.22-e2e-metal-ovn-two-node-fencing-recovery-techpreview

See details on https://pr-payload-tests.ci.openshift.org/runs/ci/eaca0990-fb9a-11f0-93d8-b2d166ddcfb2-0