ML-KEM: fix AVX2 assembly #7343

Job	Run time
build library (--enable-smallstack --enable-cryptonly --enable-all-crypto --disable-examples --di...	1m 8s
build library (--enable-intelasm --enable-cryptonly --enable-all-crypto --disable-examples --disa...	1m 1s
build library (--enable-cryptonly --enable-all-crypto --disable-examples --disable-benchmark --di...	55s
build library (--enable-cryptonly --enable-all-crypto --disable-examples --disable-benchmark --di...	1m 8s
build library (--enable-smallstack --disable-asm --enable-cryptonly --enable-all-crypto --disable...	1m 7s
build library (--disable-asm --enable-cryptonly --enable-all-crypto --disable-examples --disable-...	57s
build library (--disable-intelasm --enable-cryptonly --enable-all-crypto --disable-examples --dis...	1m 7s
build library (--enable-cryptonly --enable-all-crypto --disable-examples --disable-benchmark --di...	1m 6s
build library (--enable-smallstack --enable-intelasm --enable-cryptonly --enable-all-crypto --dis...	1m 13s
build library (--disable-intelasm --enable-cryptonly --enable-all-crypto --disable-examples --dis...	1m 0s
build library (--enable-cryptonly --enable-all-crypto --disable-examples --disable-benchmark --di...	56s
	11m 38s

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