Remove all `bs-css doesn't support` cases from declarations_to_emotion.re

[davesnx]

• Would be nice to migrate css-support test to ppx_e2e folder to ensure the interface remains in sync, create separate files for each CSS feature
• Fix for all bs-css mentions on declarations_to_emotion.re
• Add the implementations on styled-ppx.css
• Separate Unsupported_feature from "can't interpolate on those"