[lworld] RFR: 8351441: [lworld] ClassFile API support generating stack maps for strict field assignment

[Chen Liang]

Works for a basic case, running tests, need more tests to ensure other features added in this patch

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Commit messages:
 - Further optimize impl, complete tests
 - 8351441: [lworld] ClassFile API support generating stack maps for strict field assignment

Changes: https://git.openjdk.org/valhalla/pull/1392/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1392&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8351441
  Stats: 405 lines in 9 files changed: 379 ins; 7 del; 19 mod
  Patch: https://git.openjdk.org/valhalla/pull/1392.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1392/head:pull/1392

PR: https://git.openjdk.org/valhalla/pull/1392