scrap_zenodo.py: bug when output directory does not exist

[benoistlaurent]

Command:

python scripts/scrap_zenodo.py --query params/query_dev.yml --output tmp

Result:

Traceback (most recent call last):
  File "/Users/laurent/Downloads/mdws/scripts/scrap_zenodo.py", line 363, in <module>
    log_file = logging.FileHandler(f"{ARGS.output}/scrap_zenodo.log", mode="w")
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/modules/python/3.11.4/lib/python3.11/logging/__init__.py", line 1181, in __init__
    StreamHandler.__init__(self, self._open())
                                 ^^^^^^^^^^^^
  File "/opt/modules/python/3.11.4/lib/python3.11/logging/__init__.py", line 1213, in _open
    return open_func(self.baseFilename, self.mode,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: '/Users/laurent/Downloads/mdws/tmp/scrap_zenodo.log'

Proposed solution:

Test if output directory exists and, if not, create it (or die with explicit error message).