add BuildRequires pip and setuptools_scm
    
    Otherwise the build fails:
    
    ```
    + /usr/bin/python3 setup.py build '--executable=/usr/bin/python3 -sP'
    /usr/lib/python3.12/site-packages/setuptools/__init__.py:84: _DeprecatedInstaller: setuptools.installer and fetch_build_eggs are deprecated.
    !!
    
            ********************************************************************************
            Requirements should be satisfied by a PEP 517 installer.
            If you are using pip, you can try `pip install --use-pep517`.
            ********************************************************************************
    
    !!
      dist.fetch_build_eggs(dist.setup_requires)
    WARNING: The wheel package is not available.
    WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7f0992fafbf0>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution')': /simple/setuptools-scm/
    ...
    ERROR: Could not find a version that satisfies the requirement setuptools_scm (from versions: none)
    ERROR: No matching distribution found for setuptools_scm
    ```
    
    The same for pip ^
    
    Signed-off-by: Tomas Tomecek <ttomecek@redhat.com>