WebGPU: errors with unorm and half4 RWTexture

Steps to reproduce:

1. open the attached project
2.  build and run for web
3.  

Actual results: 
The project should run without error

Expected results: 
Error:
The layout's binding format (TextureFormat::RGBA8Unorm) doesn't match the shader's binding format (TextureFormat::RGBA32Float).

Reproducible with versions: 

Not reproducible with versions: 

Can’t test with versions: 

Tested on (OS): 

Notes:

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