[sdn2ovn] Migration fail in vsphere cluster

4.12.0-ec.5

Failed two times

1. Bring vsphere SDN cluster
2. Run https://raw.githubusercontent.com/openshift/release/master/ci-operator/step-registry/ovn/sdn-migration/ovn-sdn-migration-commands.sh
3. Testing failed on:
+ xargs -i oc rsh -n openshift-machine-config-operator '{}' chroot /rootfs shutdown -r +1
Defaulted container "machine-config-daemon" out of: machine-config-daemon, oauth-proxy
error: unable to upgrade connection: Authorization error (user=system:kube-apiserver, verb=create, resource=nodes, subresource=proxy)
Defaulted container "machine-config-daemon" out of: machine-config-daemon, oauth-proxy
Shutdown scheduled for Thu 2022-11-03 17:43:04 UTC, use 'shutdown -c' to cancel.
Defaulted container "machine-config-daemon" out of: machine-config-daemon, oauth-proxy
Shutdown scheduled for Thu 2022-11-03 17:43:06 UTC, use 'shutdown -c' to cancel.
Defaulted container "machine-config-daemon" out of: machine-config-daemon, oauth-proxy
Shutdown scheduled for Thu 2022-11-03 17:43:07 UTC, use 'shutdown -c' to cancel.
Defaulted container "machine-config-daemon" out of: machine-config-daemon, oauth-proxy
Shutdown scheduled for Thu 2022-11-03 17:43:08 UTC, use 'shutdown -c' to cancel.

Test log:
1. https://gcsweb-qe-private-deck-ci.apps.ci.l2s4.p1.openshiftapps.com/gcs/qe-private-deck/pr-logs/pull/openshift_release/33684/rehearse-33684-periodic-ci-openshift-openshift-tests-private-release-4.12-amd64-nightly-e2e-vsphere-ipi-sdn-migration-ovn-p2/1588005822762323968/artifacts/e2e-vsphere-ipi-sdn-migration-ovn-p2/ovn-sdn-migration/build-log.txt
2. http://file.rdu.redhat.com/~weliang/sdn2ovn.txt

error: unable to upgrade connection: Authorization error (user=system:kube-apiserver, verb=create, resource=nodes, subresource=proxy)

Migration pass

This is a new regression issue, same testing passed before.