Prepare migration to pandas 3.0 (#3360)

* fix chained `.loc` assignments in utils and materialize

* fix groupby axis=1; replace with transpose

* add tool for testing with pandas future

* flag pandas 3.0 migration issues

* Add tracking reference in pyproject.toml

* Group by bodyparts without transposing df

* add reference

Co-authored-by: Cyril Achard <cyril.achard@epfl.ch>

* add reference

Co-authored-by: Cyril Achard <cyril.achard@epfl.ch>

* add reference

Co-authored-by: Cyril Achard <cyril.achard@epfl.ch>

* revert transpose on bodypart in 4be0e607ebd8f1a546d45e097ad6bc61412977fe. (Following c9d863511e20f86fa0196aa173a38834f21836a6)

* linting: fix line length

* Line length fix

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Co-authored-by: Cyril Achard <cyril.achard@epfl.ch>