This PR will share render graphs between all contexts that run in the same thread. This allows the draw manager commands to be added to the same render graph as the UI. - Fixes debug groups hiearchy. Draw manager would restart a hierarchy as it wasn't aware of the debug groups already added by the UI - Removes cpu sync when switching between contexts. In a future change this is needed to improve discarding resources. Pull Request: https://projects.blender.org/blender/blender/pulls/124715