Check for correctly configured config, local archive, return functionality of default backup.

[emirkmo]

This just needs to be implemented in fileio. Give a warning if config is not as expected and a warning listing the backup path being used. Also a check to make sure we don't use None as a path.

See issue ran into by @rhandberg:

$ python run_photometry.py --fileid=16384
[2022-07-06 14:20:32,173| INFO| 16384 | run_photometry] ========================================================================
[2022-07-06 14:20:32,173| INFO| 16384 | run_photometry] 16384
[2022-07-06 14:20:32,173| INFO| 16384 | run_photometry] ========================================================================
[2022-07-06 14:20:32,208| INFO| 16384 | fileio] Using data from: None.
[2022-07-06 14:20:32,209| INFO| 16384 | fileio] Placing output in '/flows/photometry_workdir/2022hrs/16384'
[2022-07-06 14:21:10,758| ERROR| 16384 | run_photometry] Photometry failed:expected str, bytes or os.PathLike object, not NoneType
Traceback (most recent call last):
  File "/usr/users/kasoc/flows/flows/run_photometry.py", line 27, in process_fileid
    table = photometry(fileid=fid, cm_timeout=cm_timeout, make_plots=not no_plots,
  File "/usr/users/kasoc/flows/flows/flows/photometry.py", line 451, in timed_photometry
    results_table = do_phot(fileid, cm_timeout, make_plots, directories, datafile, rescale_dynamic)
  File "/usr/users/kasoc/flows/flows/flows/photometry.py", line 420, in do_phot
    pm = PhotometryManager.create_from_fid(fileid, directories=directories, datafile=datafile, create_directories=True)
  File "/usr/users/kasoc/flows/flows/flows/photometry.py", line 411, in create_from_fid
    return PhotometryManager(target=io.target, image=io.load_science_image(), bkg=FlowsBackground(),
  File "/usr/users/kasoc/flows/flows/flows/fileio.py", line 182, in load_science_image
    image = self._load_image(image_path)
  File "/usr/users/kasoc/flows/flows/flows/fileio.py", line 177, in _load_image
    image = load_image(self.directories.image_path(image_path), target_coord=self.target.coords)
  File "/usr/users/kasoc/flows/flows/flows/fileio.py", line 96, in image_path
    return os.path.join(self.archive_local, image_path)
  File "/usr/lib/python3.10/posixpath.py", line 76, in join
    a = os.fspath(a)
TypeError: expected str, bytes or os.PathLike object, not NoneType
[2022-07-06 14:21:10,846| INFO| 16384 | util] process shutting down