Rust

Add swizzle to i8x16 and i8x32 #491

Job	Run time
cross_compile_aarch64 (1.59)	1m 48s
cross_compile_aarch64 (1.59, std)	2m 5s
build_test (i586-pc-windows-msvc, 1.56.0, windows-latest)	2m 37s
cross_compile_aarch64 (stable)	43s
build_test (i586-pc-windows-msvc, stable, windows-latest)	1m 16s
cross_compile_aarch64 (stable, std)	26s
build_test (i586-pc-windows-msvc, beta, windows-latest)	1m 2s
cross_compile_aarch64 (nightly)	38s
build_test (i586-pc-windows-msvc, nightly, windows-latest)	1m 12s
cross_compile_aarch64 (nightly, std)	35s
build_test (i686-pc-windows-msvc, 1.56.0, windows-latest)	2m 49s
build_test (i686-pc-windows-msvc, stable, windows-latest)	59s
build_test (i686-pc-windows-msvc, beta, windows-latest)	57s
build_test (i686-pc-windows-msvc, nightly, windows-latest)	58s
build_test (x86_64-pc-windows-msvc, 1.56.0, windows-latest)	2m 55s
build_test (x86_64-pc-windows-msvc, stable, windows-latest)	57s
build_test (x86_64-pc-windows-msvc, beta, windows-latest)	1m 7s
build_test (x86_64-pc-windows-msvc, nightly, windows-latest)	1m 12s
build_test (wasm32-wasi, 1.56.0, ubuntu-latest, v5.0.0)	2m 0s
build_test (wasm32-wasi, stable, ubuntu-latest, v5.0.0)	32s
build_test (wasm32-wasi, beta, ubuntu-latest, v5.0.0)	35s
build_test (wasm32-wasi, nightly, ubuntu-latest, v5.0.0)	39s
	28m 2s

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