add_updater does not correctly retrieve the objects' name introduced in main file when embed with OpenGL.

When I enter the interactive mode through `self.interactive_embed()` with OpenGL, all objects imported in the main program, custom variables, and objects cannot be used within the `add_updater`. Here is an example: even though `from manim import *` has been used to import all Manim objects in the main program, using Dot in always_redraw is considered undefined.


Reproduce the issue by entering interactive mode with self.interactive_embed() using OpenGL, then exercise add_updater and always_redraw with an imported Dot and custom variables. Trace how names from the main program are retrieved in that path; done means imported Manim objects, custom variables, and other main-program objects are usable inside add_updater.

Written by the indexing model from the issue text.