* feat(explore): export csv data pivoted for Pivot Table
* Implement dropdown with download csv options
* Change label to "Original"
* Add tests
* Add form data to query context
* Add form data to query context generator
* Explicitly make form_data optional
* fix: Always use temporal type for dttm columns
* move inference and implement in chart postproc
* fix test
* fix test case
Co-authored-by: Ville Brofeldt <ville.v.brofeldt@gmail.com>