DOC-13347-override-default-css-for-redoc-4

DOC-13355 remove responsive table switch

This is clearly "intentional" but gives terrible results on many tables.
For example the metrics lists in this ticket, though they're strictly already semi-abusing the table syntax to display a list of cards...

It feels like we add a feature by:

* removing it (suddenly, many basic tables work again, like the one in original ticket)
* wait for writers/stakeholders to point out which tables need to be fixed with responsive CSS and deal at that point.