[lworld] RFR: 8326879: [lworld] IncompatibleClassChangeError on `value record` extending java.lang.Record

[Roger Riggs]

"value records" implicitly extend the abstract class java.lang.Record.
Class loading throws IncompatibleClassChangeError if java.lang.Record is not marked as "abstract value class".

The tests affected are:

valhalla/valuetypes/ObjectMethods.java: test Object methods on value classes
valhalla/valuetypes/ObjectMethodsViaCondy.java: Test ObjectMethods::bootstrap call via condy 

The solution is to add java.lang.Record to the set of classes that are modified for --enable-preview to be `value` classes.

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Commit messages:
 - Run various tests of Records with -XX:+EnableValhalla
 - 8326879: [lworld] IncompatibleClassChangeError on `value record` extending java.lang.Record

Changes: https://git.openjdk.org/valhalla/pull/1027/files
 Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1027&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8326879
  Stats: 17 lines in 6 files changed: 7 ins; 0 del; 10 mod
  Patch: https://git.openjdk.org/valhalla/pull/1027.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1027/head:pull/1027

PR: https://git.openjdk.org/valhalla/pull/1027