[lilliput-jdk21u:lilliput] RFR: 8314485: [Lilliput/JDK21] Cherry-pick: 8139457: Array bases are aligned at HeapWord granularity

[Roman Kennke]

Let's cherry-pick the current state of the upstream PR https://github.com/openjdk/jdk/pull/11044 into Lilliput/JDK21 in preparation for the other Lilliput-related changes. The original change applies cleanly on top of lilliput/jdk21u.

Testing:
 - [ ] tier1 -UCCP
 - [ ] tier1 +UCCP

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Commit messages:
 - 8314485: [Lilliput/JDK21] Cherry-pick: 8139457: Array bases are aligned at HeapWord granularity

Changes: https://git.openjdk.org/lilliput-jdk21u/pull/1/files
 Webrev: https://webrevs.openjdk.org/?repo=lilliput-jdk21u&pr=1&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8314485
  Stats: 246 lines in 21 files changed: 134 ins; 59 del; 53 mod
  Patch: https://git.openjdk.org/lilliput-jdk21u/pull/1.diff
  Fetch: git fetch https://git.openjdk.org/lilliput-jdk21u.git pull/1/head:pull/1

PR: https://git.openjdk.org/lilliput-jdk21u/pull/1