Merge pull request #43627 from pospispa/make-constants-public-so-that-they-can-be-used-in-an-external-provisioner

Automatic merge from submit-queue

Make Constants Public so that They Can Be Used in an Ext. Provisioner

Out-of-tree external provisioners have the same purpose as in-tree provisioners. As external provisioners work with PV and PVC datastructures it's an advantage to import certain Kubernetes packages instead of copy-pasting the Kubernetes code.

That's why the constants are made public so that they can be used in an external provisioner.

@jsafrane  @kubernetes/sig-storage-pr-reviews 

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NONE
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