RFR: 8347608: Optimize Java implementation of ML-KEM

[Ben Perez]

Added custom multi array allocation function to improve performance

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Commit messages:
 - changed multiarray allocation to improve performance

Changes: https://git.openjdk.org/jdk/pull/25151/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25151&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8347608
  Stats: 20 lines in 1 file changed: 18 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/25151.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25151/head:pull/25151

PR: https://git.openjdk.org/jdk/pull/25151