[lworld] RFR: 8378273: [lworld] Use acmp map to detect oops for VarHandle

[Chen Liang]

VarHandle reflectively checks if a class has oops (and does it incorrectly by not filtering static fields). This information is easily accessible from acmp maps, and we should use that instead of spinning our custom logic.

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Commit messages:
 - 8378273: [lworld] Use acmp map to detect oops for VarHandle

Changes: https://git.openjdk.org/valhalla/pull/2143/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=2143&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8378273
  Stats: 383 lines in 6 files changed: 226 ins; 149 del; 8 mod
  Patch: https://git.openjdk.org/valhalla/pull/2143.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/2143/head:pull/2143

PR: https://git.openjdk.org/valhalla/pull/2143