HgLoaderFromDisk: Simplify store_content using model.Content.from_data()
Instead of using hashutil.MultiHash directly and converting to model.Content.
Migrated from D5373 (view on Phabricator)
Staging instance, all changes can be removed at any time
Instead of using hashutil.MultiHash directly and converting to model.Content.
Migrated from D5373 (view on Phabricator)