RFR: 8349721: Add aarch64 intrinsics for ML-KEM [v7]

[Ferenc Rakoczi]

> By using the aarch64 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 two additional commits since the last revision:

 - Code rearrange, some renaming, fixing comments
 - Changes suggested by Andrew Dinn.

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/23663/files
  - new: https://git.openjdk.org/jdk/pull/23663/files/8d5a9e12..74ff3d9f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=23663&range=06
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=23663&range=05-06

  Stats: 2139 lines in 4 files changed: 630 ins; 826 del; 683 mod
  Patch: https://git.openjdk.org/jdk/pull/23663.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23663/head:pull/23663

PR: https://git.openjdk.org/jdk/pull/23663