DuMux installation script needs to be updated for distutils package is deprecated since python 3.10

The distutils package is deprecated and slated for removal in Python 3.12. Use setuptools or check PEP 632 for potential alternatives

Acoording to PEP 632, distutils is deprecated since python 3.10 and finally removed since 3.12. Our dumux installatoin script therefore needs to upgrade.