fix racy disk check for vsphere cloud provider
I opened this bug, so as we don't forget to backport https://github.com/kubernetes/kubernetes/pull/104410 to various version of OCP.
Do some check on 4.9.0-0.nightly-2021-09-06-004132 with regression test, no issue found. Change the status to "VERIFIED"
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (Moderate: OpenShift Container Platform 4.9.0 bug fix and security update), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2021:3759