Ensure entities and CZML work with `ModelExperimental`

[ptrgags]

While reviewing #10282, I noticed that models used in CZML and entities only use the old Model. (see ModelVisualizer.js where it calls Model.fromGltf()). This is fine for now, but when we replace the old Model with ModelExperimental, we need to make sure this still works.

Some things to check for API parity:

• the CZML Node Transforms Sandcastle should run even when using ModelExperimental
• Also check the other ModelGraphics options to make sure those get propagated correctly.

[j9liu]

Beginning to test how the CZML / Entity system holds up if we switch Model to ModelExperimental. I'm leaving notes as I go. Testing in Windows 10 / Chrome 103.0.5060.53

ModelVisualizer

• [ ] Replace Model.fromGltf with ModelExperimental.fromGltf
• [ ] Replace old bounding sphere computation in ModelVisualizer.getBoundingSphere

Sandcastles

3D Models

• [X] KTX2 Compressed Balloon is showing shadow artifacts

ModelExperimental	Model

3D Models Coloring

• [x] Alpha options aren't working for either model color or silhouette color for most models. On the Aircraft model, it works for the propellers, but nothing else.
• [x] Noticing a difference with silhouette behavior: Model makes a silhouette with the entire model, but ModelExperimental makes silhouettes for each primitive, so some of the primitives' silhouettes overlap the model. This is evident in the Aircraft model.
  • Solution: use the same stencil buffer for the same model, instead of per draw command like I did in ModelExperimentalDrawCommand
• [x] I'm noticing shadow artifacts here as well. ~Might be related to #10296 ?~

ModelExperimental	Model

Bloom (uses entity model) - no difference Clamp to 3D Model - no difference

Clamp to 3D Tiles

• [x] Does not work; model flies off into the sky. Something is off with picking -- may have to do with lack of id in ModelExperimental.

Custom Per-Feature Post Process

• [x] Does not work; model is supposed to tint red on hover, but nothing happens. ~May be a similar problem to Clamp to 3D Tiles sandcastle because picking is bugged.~

Depth of Field (uses entity model) - no difference Distance Display Conditions - no difference Lighting (uses entity model) - no difference

Per-Feature Post Processing

• [x] Does not work; same issue as Custom Per-Feature Post Process.

Physically-Based Materials

• [X] Shadow bug again:

Post Processing (uses entity model) - no difference Projection (uses entity model) - no difference

Shadows

• [X] Similar shadow issues as noted above, bands / artifacts. Gets worse with soft shadows, even though Model results in artifacts as well.

Terrain Clipping Planes (uses entity model) - no difference

Time-Dynamic Wheels

• [x] Relies on private Model.getNode function to work, but this doesn't exist for ModelExperimental, so it crashes.

[j9liu]

I went through all of the sandcastles involving these changes. They all appear to work after #10530 was merged + subsequent PRs were merged to fix the bugs. I'm closing this issue now.