add node readiness check that watches for edges

[deads2k]

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[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: deads2k

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[openshift-ci]

@deads2k: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/unit	b0d2566	link	true	/test unit
ci/prow/verify-deps	b0d2566	link	true	/test verify-deps
ci/prow/e2e-gcp-ovn-upgrade	b0d2566	link	true	/test e2e-gcp-ovn-upgrade
ci/prow/e2e-gcp-csi	b0d2566	link	false	/test e2e-gcp-csi
ci/prow/e2e-gcp-ovn	b0d2566	link	true	/test e2e-gcp-ovn
ci/prow/e2e-gcp-ovn-rt-upgrade	b0d2566	link	false	/test e2e-gcp-ovn-rt-upgrade
ci/prow/verify	b0d2566	link	true	/test verify
ci/prow/e2e-metal-ipi-ovn	b0d2566	link	false	/test e2e-metal-ipi-ovn
ci/prow/e2e-agnostic-ovn-cmd	b0d2566	link	false	/test e2e-agnostic-ovn-cmd
ci/prow/images	b0d2566	link	true	/test images
ci/prow/e2e-metal-ipi-ovn-kube-apiserver-rollout	b0d2566	link	false	/test e2e-metal-ipi-ovn-kube-apiserver-rollout

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