Update memory scope rules for WebGPU to be in line with changes to spec #2721
Description
Change to spec: gpuweb/spirv-execution-env@131313e
Remove Subgroup from allowed memory scopes.
Add Invocation to allowed memory scopes.
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Change to spec: gpuweb/spirv-execution-env@131313e
Remove Subgroup from allowed memory scopes.
Add Invocation to allowed memory scopes.