Model specific IO functions are not usable from python

[HenrZu]

Motivation / Current Behaviour

No response

Enhancement description

Write python bindings, so set_vaccination_data ``set_divi_data ``set_confirmed_cases_data ``set_population_data can be called from python code. Currently, this is not explicitly possible since they are all combined in the read_input_data function.

Additional context

No response

Checklist

• [X] Attached labels, especially loc:: or model:: labels.
• [X] Linked to project