Powei Feng 45fcea101f webgpu: enable choosing vulkan backend on MacOS (#9106) ...

- Add a Configuration struct to the WebGPUPlatform class.  This
   allows for client-side setting of WebGPU backend configurations.
 - Add a configuration for forcing the wgpu backend to pick a
   certain backend.
 - Add Vulkan as a potential backend for WebGPU + MacOS.
 - Locally modify Dawn so that it does not assume only switfshader
   is available for Vulkan on MacOS.
 - Enable vulkan support for Dawn (third_party/dawn/tnt/CMakeLists.txt)
 - Plumb option to pick different WebGPU backend through
   FilamentApp and gltf_viewer.

2025-08-20 04:50:17 +00:00

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