Nanox: re-enable generated tests

[emturner]

Disabled in #22.

The OCR system was completely re-done in the SDK version used in #22 - rather than using OCR, instead the actual bitmaps are extracted from the elf binaries and are used to get info off the screen. (See LedgerHQ/speculos#418 for context)

We will likely have to talk to Ledger to confirm the issue

[spalmer25]

After some experimentation, in some cases, the result of $URL/events?currentscreenonly=true does not seem to correspond to what is actually on the screen.
For example, if the screen contains a _, a - or a ~, then the result is truncated starting from this character.