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Add support for _mm256_max_epu32 #585

Job	Run time
Dub Tests (windows-latest, dmd-latest)	1m 14s
Dub Tests (windows-latest, dmd-2.097.0)	1m 0s
Dub Tests (windows-latest, dmd-2.096.1)	1m 0s
Dub Tests (windows-latest, dmd-2.095.1)	56s
Dub Tests (windows-latest, dmd-2.094.2)	43s
Dub Tests (windows-latest, ldc-latest)	1m 2s
Dub Tests (windows-latest, ldc-1.33.0)	1m 10s
Dub Tests (windows-latest, ldc-1.32.2)	1m 2s
Dub Tests (windows-latest, ldc-1.31.0)	1m 10s
Dub Tests (windows-latest, ldc-1.30.0)	1m 13s
Dub Tests (windows-latest, ldc-1.29.0)	1m 11s
Dub Tests (windows-latest, ldc-1.28.1)	1m 10s
Dub Tests (windows-latest, ldc-1.27.1)	1m 4s
Dub Tests (windows-latest, ldc-1.26.0)	1m 12s
Dub Tests (windows-latest, ldc-1.25.1)	1m 14s
Dub Tests (windows-latest, ldc-1.24.0)	1m 14s
	17m 35s

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