[lworld] RFR: 8372304: [lworld] Test serviceability/jvmti/valhalla/HeapDump/HeapDump.java fails in product build

[Alex Menkov]

The test executes subprocess with `-XX:+PrintInlineLayout` and `-XX:+PrintFlatArrayLayout` arguments. These are diagnostic arguments, require `-XX:+UnlockDiagnosticVMOptions` to unlock.

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Commit messages:
 - fix

Changes: https://git.openjdk.org/valhalla/pull/1754/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1754&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8372304
  Stats: 3 lines in 1 file changed: 1 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/valhalla/pull/1754.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1754/head:pull/1754

PR: https://git.openjdk.org/valhalla/pull/1754