Prevent a crash if the local folder does not exist anymore

Traceback (most recent call last):
  File "nxdrive/__main__.py", line 113, in main
  File "nxdrive/commandline.py", line 507, in handle
  File "nxdrive/commandline.py", line 514, in get_manager
  File "nxdrive/manager.py", line 175, in __init__
  File "nxdrive/manager.py", line 377, in load
  File "nxdrive/engine/engine.py", line 144, in __init__
  File "nxdrive/utils.py", line 149, in find_suitable_tmp_dir
  File "pathlib.py", line 1168, in stat
FileNotFoundError: [Errno 2] No such file or directory: '/home/nuxeo/Drive/Company UAT'