Don't allow adding Objects to the project settings
Don't allow adding Objects to the project settings

Godot doesn't support serializing objects.

This closes #33667.

(cherry picked from commit 7b84f4fc31f40f88575ca7805852d1be9dec3f81)

ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot