Zen4 SIMD documentatation and detection support
The following discussion from !3476 (merged) should be addressed:
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@pszilard started a discussion: (+2 comments) I have no data on Zen4 so can't recommend anything. Asked for feedback through a couple of channels, if I get something I'll update it, but it is likely that AVX_512 is always better (and our detection code would need an update too).