Support python >3.11 #541

I've set up a test build as github action to have more transparant reporting.
This also helps to surface issues in newer python versions quickly:
https://github.com/Open-EO/openeo-python-driver/actions/workflows/ci.yml

• pkg_resources change, this may require us to drop (unmaintained?) dependency openeo-processes
• fiona doesn't have a wheel for 3.14, maintenance seems slow on that dependency, pyogrio seems the better alternative