Add backend intrinsics/built-in functions to their respective reserved keywords list #4555
Description
User defined symbols might collide with backend intrinsics, we need to rename them.
- HLSL Complete HLSL reserved symbols naga#2367
- MSL: Add more metal keywords #4707, might need more
- WGSL
- GLSL [glsl-out] Add built-in functions to keywords naga#2410