[lworld] RFR: 8378273: [lworld] Use acmp map to detect oops for VarHandle [v4]

[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.

Chen Liang has updated the pull request incrementally with one additional commit since the last revision:

  Update terminology because everyone seems confused as hell

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Changes:
  - all: https://git.openjdk.org/valhalla/pull/2143/files
  - new: https://git.openjdk.org/valhalla/pull/2143/files/30be499d..e36eff38

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=valhalla&pr=2143&range=03
 - incr: https://webrevs.openjdk.org/?repo=valhalla&pr=2143&range=02-03

  Stats: 48 lines in 5 files changed: 8 ins; 0 del; 40 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