openqa etc.: use pip for local installs, not setuptools
    
    On Fedora 39, we ran into an issue with setuptools that isn't
    immediately resolvable:
    https://github.com/pypa/setuptools/issues/3797#issuecomment-1783613895
    using pip like this seems to avoid it.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>