Sentry Issue: NUXEO-DRIVE-452
When find_suitable_tmp_dir() does not find a suitable folder that is on the same hard-drive than the sync folder, it will fallback to the $HOME/.nuxeo-drive folder. And obviously, we will end with folders on different HD and thus the error.
We should enforce the same hard-drive even more than what is done currently. If the sync folder does not exist, then create it and use its parent.