fix(SceneState): clear updaters on restore_scene (#2397)

* fix(SceneState): clear updaters on restore_scene

Previously, restoring a scene checkpoint did not reset updaters.
This caused discrepancies when switching between checkpoints if
a mobject had updaters attached.

Now, restore_scene clears all updaters before restoring the mobject,
ensuring scene state consistency across checkpoints.

* Refactor restore_scene to use list comprehension

---------

Co-authored-by: Grant Sanderson <[email protected]>