Archive experiments

[bpiwowar]

On some clusters, some partitions are faster... but time-limited. It would be good to have an archive option, where experiments and their jobs would be moved (when successful) to another location. Optionally, this folder can be used as a recovery when deleted from the main location.

In details:

1. Add backup_folder in WorkspaceSettings with a path attribute (so that we can add later others)
2. Whenever a job finishes, copy all the files except experimaestro related (except the dynamic outputs file which should be preserved). Have a submit option (backup=False) that prevents this behavior.
3. If at some point a job was deleted but can be recovered, copy it back from backup (and add .done to mark it as done when copy is over)
4. Add CLI options (e.g. orphans) to include backup (true by default); add also this to the TUI interface