Problem: TypeError submitting directory containing zip with delete_packages_after_extraction enabled

[camlyall]

Describe the bug
TypeError when submitting directory containing zip with delete_packages_after_extraction enabled

To Reproduce
Submit a folder containing a zip file with processing configurations extract_packages and delete_packages_after_extraction enabled

Steps to reproduce the behavior:

cd ~

echo "Sample" > sample.txt
mkdir sample
mv sample.txt sample
zip -r sample.zip sample
mv sample.zip sample

git clone https://github.com/artefactual-labs/a3m.git
cd a3m
docker build . -t a3m

docker run --rm --network a3m-network --name a3md --detach --publish 7000:7000 a3m

docker cp ../sample a3md:/a3m

docker run --rm --network a3m-network --name a3mc --interactive --tty --entrypoint=python a3m -m a3m.cli.client --name delete_extracted_test --address=a3md:7000 -p delete_packages_after_extraction=yes -p extract_packages=yes /a3m/sample

# See error: 
docker logs a3md

Expected behavior
Zip file should be extracted and removed.

Additional context
Processing of single zipfile with these config options works fine.
Processing with delete_packages_after_extraction disabled works fine.

The error produced:

Traceback (most recent call last):
  File "/home/a3m/.pyenv/versions/3.9.18/lib/python3.9/concurrent/futures/_base.py", line 330, in _invoke_callbacks
    callback(self)
  File "/a3m/a3m/server/queues.py", line 213, in _job_completed_callback
    next_job = future.result()
  File "/home/a3m/.pyenv/versions/3.9.18/lib/python3.9/concurrent/futures/_base.py", line 439, in result
    return self.__get_result()
  File "/home/a3m/.pyenv/versions/3.9.18/lib/python3.9/concurrent/futures/_base.py", line 391, in __get_result
    raise self._exception
  File "/home/a3m/.pyenv/versions/3.9.18/lib/python3.9/concurrent/futures/thread.py", line 58, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/home/a3m/.pyenv/versions/3.9.18/lib/python3.9/contextlib.py", line 79, in inner
    return func(*args, **kwds)
  File "/a3m/a3m/server/jobs/client.py", line 106, in run
    self.submit_tasks()
  File "/a3m/a3m/server/jobs/client.py", line 184, in submit_tasks
    for file_replacements in self.package.files(filter_subdir=self.filter_subdir):
  File "/a3m/a3m/server/packages.py", line 299, in files
    file_obj_mapped = get_file_replacement_mapping(
  File "/a3m/a3m/server/packages.py", line 41, in get_file_replacement_mapping
    dirname = os.path.dirname(file_obj.currentlocation)
  File "/home/a3m/.pyenv/versions/3.9.18/lib/python3.9/posixpath.py", line 152, in dirname
    p = os.fspath(p)
TypeError: expected str, bytes or os.PathLike object, not NoneType