Add support for Versioning

[dkarlovi]

https://learn.microsoft.com/en-us/azure/storage/blobs/versioning-overview

Note that on storages with both soft-delete and versioning enabled, the blob is marked as deleted by setting the Status: Previous version instead of Status: Deleted (like on storages which only have soft delete enabled).

[brecht-vermeersch]

Improved tests to allow testing on storage accounts with versioning enabled #19