RFR: 8351034: Add AVX-512 intrinsics for ML-DSA [v12]

[Volodymyr Paprotski]

On Mon, 31 Mar 2025 14:40:56 GMT, Ferenc Rakoczi <duke at openjdk.org> wrote:

>> By using the AVX-512 vector registers the speed of the computation of the ML-DSA algorithms (key generation, document signing, signature verification) can be approximately doubled.
>
> Ferenc Rakoczi has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Reacting to comments by Volodymyr.

No further comments from me. (I did leave two questions, but nothing that requires code changes)

Thanks for addressing all my many (lengthy) comments and questions. And the refactor!

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Marked as reviewed by vpaprotski (Author).

PR Review: https://git.openjdk.org/jdk/pull/23860#pullrequestreview-2723440925