RFR: 8351412: Add AVX-512 intrinsics for ML-KEM [v7]

[Sean Mullan]

On Tue, 20 May 2025 17:49:14 GMT, Ferenc Rakoczi <duke at openjdk.org> wrote:

>> By using the AVX-512 vector registers the speed of the computation of the ML-KEM algorithms (key generation, encapsulation, decapsulation) can be approximately doubled.
>
> Ferenc Rakoczi has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Added some comments.

Please also write a release note as the performance improvement is significant. Thanks!

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PR Comment: https://git.openjdk.org/jdk/pull/24953#issuecomment-2895525488