backported "remove pivot-grouping row and columns in tandem" (#50530)

* remove pivot-grouping row and columns in tandem (#50476)

* remove pivot-grouping row and columns in tandem

* add pivot card scalar test for csvs and xlsx.

* improve test feedback

* add a 'todo' for pivoted json exports

* indent

* tap tap tap

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Co-authored-by: bryan <bryan.maass@gmail.com>
Co-authored-by: Adam James <adam.vermeer2@gmail.com>