add `spirv-unknown-naga-wgsl` target via naga #483

Job	Run time
Test (macOS-latest, aarch64-apple-darwin)	3m 32s
Compiletest (windows-2022, x86_64-pc-windows-msvc)	6m 14s
Test (windows-2022, x86_64-pc-windows-msvc)	3m 19s
Compiletest (ubuntu-24.04, x86_64-unknown-linux-gnu)	6m 29s
Test (ubuntu-24.04, x86_64-unknown-linux-gnu)	3m 14s
cargo-deny	1m 4s
Compiletest (macOS-latest, aarch64-apple-darwin)	6m 8s
Lint	6m 28s
Difftest (macOS-latest, aarch64-apple-darwin)	6m 31s
Difftest (windows-2022, x86_64-pc-windows-msvc)	6m 14s
Android (ubuntu-24.04, aarch64-linux-android, x86_64-unknown-linux-gnu)	6m 30s
Difftest (ubuntu-24.04, x86_64-unknown-linux-gnu)	6m 31s
test_success	1s
	1h 2m 15s

Provide feedback