Improve forward signature test (#27729)
* First draft
* Extend test_forward_signature
* Update tests/test_modeling_common.py
Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>
* Revert suggestion
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Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>
