[lworld] Integrated: 8329327: [lworld] refactoring ignored tests

[Vicente Romero]

some regression tests had been ignored due to verifier errors as the VM was adapting to the latest changes in the class file for JEP 401. Those tests need to be re-enabled and in some cases adapted to the latest JLS for JEP 401

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Commit messages:
 - 8329327: [lworld] refactoring ignored tests

Changes: https://git.openjdk.org/valhalla/pull/1067/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1067&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8329327
  Stats: 903 lines in 10 files changed: 12 ins; 863 del; 28 mod
  Patch: https://git.openjdk.org/valhalla/pull/1067.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1067/head:pull/1067

PR: https://git.openjdk.org/valhalla/pull/1067