WebGPU StandardMaterial doesn't recognize pointSize

StandardMaterial in WebGL2 recognizes the pointSize property.
WebGPU does not. All points are the default size.

Not supported according to

https://doc.babylonjs.com/setup/support/webGPU/webGPUStatus#features-with-incomplete-support

Opening Feature Request instead.

Yup, we need to wait on WebGPU here