[Data grid] implement drag & drop

[DanielleRameau]

and align together with designer see: https://salesforce-ux.github.io/dnd-a11y-patterns/#/sortB?_k=o7pwey

Tasks

Beta Give feedback

1. reorder rows
2. groups are out of scope, disabled dragging while grouping is on
3. dragging with (accessible) keyboard navigation
4. align styling together with designer (is difficult due to usage of native drag and drop functionality)
5. Styling is a whole (apply tokens etc) and check with designer