dash_bio.Molecule3dViewer has props that can't be used in Python

[LiamConnors]

Describe the bug

dash_bio.Molecule3dViewer has two JS function props exposed that are unusable in Python.

• onRenderNewData and onChangeSelection

The context: when working on how the reference docs are generated within the docs (we are going to generate them based on the arguments of the Python component), these two props are added to the reference docs.

https://github.com/plotly/ddk-dash-docs/pull/632

@alexcjohnson