Launcher cleanup_on_exit is not clear

[germa89]

This argument naming is not clear.

One would think it aims to delete all the files created during the session, but it is not. That is remove_temp_dir is for, but only works when the instance was running in a temp directory (ansys_asodfioia).

It does:

Exit MAPDL when Python exits or when this instance is garbage
collected.

I would like to propose change that argument to close_instance_on_exit. I know it is long, but I'm happy to heard other suggestions.

Pinging @pyansys/pymapdl-developers for feedback

[germa89]

I wonder if I should also create another argument cleanup_all_files_on_exit which will clean all files in the simulation folder. It might be dangerous though.