Adjust overviews to USB images

Remove intermediary Tails from Windows
- Linux has no intermediary Tails anymore
- Put all the steps in overviews on a single line? (except manual upgrade?)

Feature Branch: doc/15810-adjust-overviews-to-img

Original created by @sajolida on 15810 (Redmine)

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information