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
0d71d83d47