[lworld] RFR: 8377467: [lworld] More defensive assertion guards for array layouts and properties [v3]

[Paul Hübner]

> Hi all,
> 
> This change hardens our assertions and fixes a bug. 
> 
> Testing: tiers 1-3.

Paul Hübner has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains eight commits:

 - New sanity.
 - Merge branch 'lworld' into JDK-8377467
 - Merge branch 'lworld' into JDK-8377467
 - Fix typo in merge.
 - Merge branch 'lworld' into JDK-8377467
 - Explode asserts.
 - Second iteration.
 - First pass of LayoutKind.

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Changes: https://git.openjdk.org/valhalla/pull/2103/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=2103&range=02
  Stats: 9 lines in 7 files changed: 8 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/valhalla/pull/2103.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/2103/head:pull/2103

PR: https://git.openjdk.org/valhalla/pull/2103