Add --no-index --no-warn-script-location pip options to %pyX_install_wheel
    
    --no-index saves a ~1 minute timeout of pip possibly checking if there is
    a newer pip version (in mock with disabled network).
    
    --no-warn-script-location removes a bogus warning that says:
    
        WARNING: The scripts easy_install and easy_install-3.9 are installed in
        '/builddir/build/BUILDROOT/python-setuptools-49.2.0-1.fc33.x86_64/usr/bin'
        which is not on PATH.
        Consider adding this directory to PATH or, if you prefer to suppress this warning,
        use --no-warn-script-location.