Split storageImageDestination.putBlobToPendingFile from storageImageDestination.PutBlob
Split storageImageDestination.putBlobToPendingFile from storageImageDestination.PutBlob

For now this is just an alias, but we will want to remove the public
PutBlob implementation (in favor of using a generic compat wrapper).

Signed-off-by: Miloslav Trmač <9c008e38982a5397deb855345fb164f0558459ae@redhat.com>

containers/image,containers/image