Add typings to OpenGLMobject (#3803)

* Add typings to OpenGLMobject

* Import typing_extensions

* Add explicit returns to inner functions in .arrange_in_grid()

* Add quotes to parameters in ValueError

* Add some more typings

* Address requested changes

* Type apply_over_attr_arrays with TypeVar

* Fix use of TypeVar

* Add Vector3D typing in set_x, set_y and set_z

Author: chopan050