Explicitly opt-out from Python name-based provides and obsoletes generators
    
    In Koji, python3-rpm-generators are not installed during the build.
    However, packagers can have them installed locally, in mock or in Copr.
    This way, we make sure the automatic provides (and obsoletes)
    do not magically appear only in some environments.
    
    Since python3-rpm-macros actually requires python-rpm-macros,
    the requirement is self-satisfied when the automatic provides are generated.