[naga] Implement subgroup quad ops

[valaphee]

Connections Partially solves https://github.com/gfx-rs/wgpu/issues/5555 Resolves https://github.com/gfx-rs/wgpu/issues/5670 https://github.com/gpuweb/gpuweb/blob/main/proposals/subgroups.md

Description Describe what problem this is solving, and how it's solved.

Testing Explain how this change is tested.

Checklist

• [x] Run cargo fmt.
• [x] Run cargo clippy. If applicable, add:
  • [ ] --target wasm32-unknown-unknown
  • [ ] --target wasm32-unknown-emscripten
• [x] Run cargo xtask test to run tests.
• [ ] Add change to CHANGELOG.md. See simple instructions inside file.