Remove unused copy_to_originals
Update copy to arrange functionality

refs #6131

Update copy_to_arrange endpoint to expect the SIPArrange table.
Instead of moving files on disk, add entries to the SIPArrange table
with the original path and the new arranged path.  Since only the
source and destination path are sent, fetch the full directory
structure from backlog Location.
Update directory handling in arrange panel

refs #6131

Update create directory function to expect SIPArrange table.
Directories in SIPArrange now have NULL for the source path and
file_uuid, as there may be no original source, and we only care about
moving the actual files around.  Updated unit test and fixture to match.