Add python version specific jobs to CI

The python specific jobs were initially a part of !152 (merged). While working on that MR I noticed that tests/test_integration.py::test_integration_static_structure_factor fails for python versions >3.9. Since there remain some wrinkles to be worked out for !152 (merged) I decided to move out the python version specific jobs to this MR in order to allow others to work on resolving the failing test. (It is actually more of a regression than an integration test.)