ModelExperimental - Support rendering in 2D and Columbus View modes

[ptrgags]

Making a note to keep track of this, ModelExperimental does not yet make draw commands for 2D and Columbus View modes.

Without this, the model ends up out of view or renders incorrectly:

[lilleyse]

It would be great to fix some of the long running projection issues:

#5112
#5955

We'll need to keep the positions in memory and generate a new vertex buffer containing the projected positions. This would be similar to how indices are handled in #10332. For further optimization ModelExperimental should only do this if frameState.scene3DOnly is false, similar to what other primitives do.

[lilleyse]

@j9liu can this be closed now that #10384 is merged?

[j9liu]

I wanted to keep this open until the individual model projection was merged, if that's okay?

[lilleyse]

@j9liu yes that's fine