Drawer: Position under nav & minor redesign (#67824)
* Drawer: Redesign WIP
* Fix double margin
* Teak pos
* align paddings
* Hide toolbar actions when drawer is open
* deprecate expandable
* Updated test
* remove expandable var
* Added clickaway
(cherry picked from commit ae1a85b5ad)
Co-authored-by: Torkel Ödegaard <torkel@grafana.com>