271 expand tests of the python bindings

[MaxBetzDLR]

Changes

Update tests of ODE Seir and Secir model to include a validation of the python bindings by comparing them to results from a c++ simulation. Also change the corresponding examples to use the same parameters.

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Checks by code author

• Every addressed issue is linked (use the "Closes #ISSUE" keyword below)
• New code adheres to coding guidelines
• No large data files have been added (files should in sum not exceed 100 KB, avoid PDFs, Word docs, etc.)
• Tests are added for new functionality and a local test run was successful
• Appropriate documentation for new functionality has been added (Doxygen in the code and Markdown files if necessary)
• Proper attention to licenses, especially no new third-party software with conflicting license has been added

Checks by code reviewer(s)

• Corresponding issue(s) is/are linked and addressed
• Code is clean of development artifacts (no deactivated or commented code lines, no debugging printouts, etc.)
• Appropriate unit tests have been added, CI passes and code coverage is acceptable (did not decrease)
• No large data files added in the whole history of commits(files should in sum not exceed 100 KB, avoid PDFs, Word docs, etc.)

Additional context

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Closes #271

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (6f16ed4) 95.60% compared to head (270e5a5) 95.88%.
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #605      +/-   ##
==========================================
+ Coverage   95.60%   95.88%   +0.27%     
==========================================
  Files         118      118              
  Lines        9443     9397      -46     
==========================================
- Hits         9028     9010      -18     
+ Misses        415      387      -28     

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