Rounded Corners settings do not map to upstream

Problem/Motivation

In upstream Bootstrap 4 & 5 there is support for rounded corners in the utility class. However they are implemented differently than in this module. They follow the same logic as the other borders (top bottom left right) instead of corners.
https://getbootstrap.com/docs/5.3/utilities/borders/#radius

Proposed resolution

Change the rounded corner styles to reflect upstream approach which is defined by sides instead of corners.