polyval: add `avx2` to runtime CPU feature check (#316) #605

Job	Run time
test-wasm	25s
test-cross (armv7-unknown-linux-gnueabi)	1m 34s
test-cross (powerpc-unknown-linux-gnu)	1m 16s
build-no-std	15s
test-miri (x86_64-unknown-linux-gnu)	41s
test-clmul (x86_64-unknown-linux-gnu, 1.85.0)	30s
test-miri (aarch64-unknown-linux-gnu)	58s
test-clmul (i686-unknown-linux-gnu, 1.85.0, sudo apt update && sudo apt install gcc-multilib)	51s
test-clmul (i686-unknown-linux-gnu, stable, sudo apt update && sudo apt install gcc-multilib)	37s
test-soft (i686-unknown-linux-gnu, stable, sudo apt update && sudo apt install gcc-multilib)	36s
test-soft (i686-unknown-linux-gnu, 1.85.0, sudo apt update && sudo apt install gcc-multilib)	43s
test-soft (x86_64-unknown-linux-gnu, 1.85.0)	32s
test-clmul (x86_64-unknown-linux-gnu, stable)	31s
test-soft (x86_64-unknown-linux-gnu, stable)	28s
test-autodetect (x86_64-unknown-linux-gnu, 1.85.0)	35s
test-autodetect (aarch64-apple-darwin, 1.85.0, macos-latest)	45s
test-autodetect (i686-unknown-linux-gnu, 1.85.0, sudo apt update && sudo apt install gcc-multilib)	52s
test-autodetect (aarch64-unknown-linux-gnu, 1.85.0, ubuntu-24.04-arm)	44s
test-autodetect (aarch64-unknown-linux-gnu, stable, ubuntu-24.04-arm)	38s
test-autodetect (aarch64-apple-darwin, stable, macos-latest)	51s
test-autodetect (i686-unknown-linux-gnu, stable, sudo apt update && sudo apt install gcc-multilib)	52s
test-autodetect (x86_64-unknown-linux-gnu, stable)	36s
	15m 50s

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