A more accurate termcolor.colored fallback

[Avasam]

utils.colored's signature now correctly reflects termcolor.colored
Attempt in scripts/runtests.py to deduplicate the same fallback (using utils module in an outside folder).
I think the solution is fine, but you tell me. VSCode can pick-up the source just fine, mypy might need an extra mypy_path="tests" to remove # type: ignore[import] at line 13.
Edit: Apparently it wasn't a great solution (see comments below)

[AlexWaygood]

Eeeeee, I have a strong aversion to mucking about with sys.path 😅 I've heard lots of horror stories about where that gets you...

[Avasam]

[...] I've heard lots of horror stories about where that gets you...

I'll trust your experience on that !
If there's no better solution, it's not that bad of a code duplication, so I can go back to using a fallback (but the one with proper signature).
I was thinking eventually it could use the test scripts directly from within python, instead of having to call a subprocess.

[AlexWaygood]

If there's no better solution, it's not that bad of a code duplication, so I can go back to using a fallback (but the one with proper signature).

Yeah, that sounds fine to me for now :)