Automatic merge from submit-queue Add Local Storage Capacity Isolation API This PR adds the new APIs to support storage capacity isolation as described in the proposal [https://github.com/kubernetes/community/pull/306](url) 1. Add SizeLimit for emptyDir volume 2. Add scratch and overlay storage type used by container level or node level **Release note**: ```release-note Alpha feature: Local volume Storage Capacity Isolation allows users to set storage limit to isolate EmptyDir volumes, container storage overlay, and also supports allocatable storage for shared root file system. ```
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