pyp2rpm converts all extras to runtime Requires

[hroncok]

I've noticed here and here:

https://bugzilla.redhat.com/show_bug.cgi?id=2083243 fastbencode 0.0.7
https://bugzilla.redhat.com/show_bug.cgi?id=2058961 unicodedata2 14.0.0

In both cases, the extras used to build/test the package were converted to runtime requires.

fastbencode[cext] caused:

Requires:       python3dist(cython) >= 0.29

unicodedata2[testing] caused:

Requires:       python3dist(coverage)
Requires:       python3dist(pytest)
Requires:       python3dist(pytest-randomly)
Requires:       python3dist(pytest-xdist)

This is not a good idea. Those are build dependencies, not runtime dependencies. pyp2rpm cannot know if the extras are useful at runtime or not.