[lworld] RFR: 8327253: [lworld] Preloading of classes needs a complete rework

[Frederic Parain]

Rework of class preloading to fix existing issues and support new preloading scheme (see CR for details).
Also change the array of inline types fields classes from InlineKlass** to Array<InlineKlass*>*, much easier to manage.

Fred

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Commit messages:
 - Fix exception message
 - Merge remote-tracking branch 'upstream/lworld' into preload
 - Preloading reworked

Changes: https://git.openjdk.org/valhalla/pull/999/files
 Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=999&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8327253
  Stats: 829 lines in 13 files changed: 578 ins; 143 del; 108 mod
  Patch: https://git.openjdk.org/valhalla/pull/999.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/999/head:pull/999

PR: https://git.openjdk.org/valhalla/pull/999