RFR: 8298390: Implementing ML-KEM key encapsulation mechanism [v7]

[Ben Perez]

> Java implementation of ML-KEM, the [FIPS 203](https://csrc.nist.gov/pubs/fips/203/final) post-quantum KEM scheme. Depends on https://github.com/openjdk/jdk/pull/21167

Ben Perez has updated the pull request incrementally with one additional commit since the last revision:

  Removed several unused variables and unnecessy allocations

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Changes:
  - all: https://git.openjdk.org/jdk/pull/21478/files
  - new: https://git.openjdk.org/jdk/pull/21478/files/f80e8d7b..d1f42ef2

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21478&range=06
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21478&range=05-06

  Stats: 20 lines in 2 files changed: 2 ins; 12 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/21478.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21478/head:pull/21478

PR: https://git.openjdk.org/jdk/pull/21478