[DO NOT MERGE] Switch to Rust version of spirv-tools#521

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LegNeato wants to merge 54 commits intoRust-GPU:mainfrom

LegNeato:spirvopt

Commits on Feb 4, 2026

Commits on Feb 5, 2026

Update SPIRV-Tools to fix row-major matrix layout validation
LegNeato
committed
Update SPIRV-Tools to enable relaxed block layout for Universal 1.3+
LegNeato
committed
Update SPIRV-Tools to split large files into submodules
LegNeato
committed

Commits on Feb 6, 2026