Backport of CSI: set plugin socket path on restore into release/1.1.x #12665
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Backport
This PR is auto-generated from #12149 to be assessed for backporting due to the inclusion of the label backport/1.1.x.
WARNING automatic cherry-pick of commits failed. Commits will require human attention.
The below text is copied from the body of the original PR.
The Prestart hook for task runner hooks doesn't get called when we
restore a task, because the task is already running. The Postrun hook
for CSI plugin supervisors needs the socket path to have been
populated so that the client has a valid path.
This got missed in testing #12078, I suspect because I was testing a lot with node plugins running as system jobs which quickly get replaced if you're not paying close attention. In any case, that PR hasn't shipped in a release yet, so there's no changelog. It'll need to be backported with that changeset.