Import CI tests from RHEL
    
    This is from RHEL distgit tests/Cython, directory Sanity/smoke.
    
    The original commit hash: 36cb03f34340bf13e42326bd9cb26f5f03b6fc27
    
    Only necessary files were kept. Some outdated stuff was removed.
    
    Co-Authored-By: Jan Kepler <jkejda@redhat.com>
    Co-Authored-By: Lukáš Zachar <lzachar@redhat.com>