rename and re-arrange old results to plot them more easily

- rename and rearragne resutls to be more consistently named
  and organized
- separate multi-gpu results from single gpu results
- use underscrore instead of space on names
- each folder will only contain one set of benchmark results
- separate amd and nvidia results to own subfolders

Signed-off-by: Mika Laitio <[email protected]>

Author: lamikr