Make our automated test suite take into account USB image updates wrt. supported installation & update methods

- .img + .iso as inputs,

- run different tests on them,
- add scenarios for new cases

Feature Branch: test/16004-adapt-usb-scenarios-to-usb-images+force-all-tests

Original created by @u on 16004 (Redmine)

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