Automatic merge from submit-queue (batch tested with PRs 62266, 64351, 64366, 64235, 64560). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.
Adding CSI driver registration with plugin watcher
Adding CSI driver registration bits. The registration process will leverage driver-registrar side which will open the `registration` socket and will listen for pluginwatcher's GetInfo calls.
```release-note
Adding CSI driver registration code.
```
/sig sig-storage
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