Extend support for extracting common subexpressions

[dweindl]

Extend support for extracting common subexpressions to previously unsupported functions such as sx0. Add tests.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 77.49%. Comparing base (be3ed58) to head (00df75c).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3170      +/-   ##
==========================================
- Coverage   78.14%   77.49%   -0.65%     
==========================================
  Files         317      317              
  Lines       20772    20778       +6     
  Branches     1484     1483       -1     
==========================================
- Hits        16232    16102     -130     
- Misses       4532     4668     +136     
  Partials        8        8              

Flag	Coverage Δ
cpp	70.08% <100.00%> (-0.02%)	⬇️
cpp_python	36.92% <62.50%> (+<0.01%)	⬆️
petab	46.91% <62.50%> (+<0.01%)	⬆️
petab_sciml	15.01% <12.50%> (-0.01%)	⬇️
python	68.58% <100.00%> (-0.01%)	⬇️
sbmlsuite-jax	?

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Files with missing lines	Coverage Δ
...n/sdist/amici/exporters/sundials/cxxcodeprinter.py	95.79% <100.00%> (+0.22%)	⬆️
python/sdist/amici/exporters/sundials/de_export.py	96.44% <ø> (ø)

... and 7 files with indirect coverage changes

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