[lworld] RFR: 8331503: [lworld] Tearing issues in the interpreter when using the Access API

[Frederic Parain]

Fix the way the interpreter is copying value payloads to prevent primitive fields tearing.

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

Commit messages:
 - Merge remote-tracking branch 'upstream/lworld' into value_copy
 - Prevent tearing of primitive fields during value copying (interpreter)

Changes: https://git.openjdk.org/valhalla/pull/1285/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1285&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8331503
  Stats: 152 lines in 6 files changed: 150 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/valhalla/pull/1285.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1285/head:pull/1285

PR: https://git.openjdk.org/valhalla/pull/1285