[lworld] RFR: Merge jdk

[David Simms]

Merge tag 'jdk-21+1'

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Commit messages:
 - Fixed merge
 - Re-enabled JDK-8242115 now that issues were fixed by JDK-8295066
 - PrimitiveObjectMethods -> ValueObjectMethods renaming in test code
 - Merge branch 'lworld_merge_jdk_21_1' of https://github.com/MrSimms/valhalla into lworld_merge_jdk_21_1
 - Missed handrolled class version
 - IR framework fixes
 - Missed aarch64 InstanceKlass misc_status changes
 - Classfile Version to 65
 - Missing code after previous back-out of JDK-8242115 (fixed by JDK-8295066)
 - Logical merge fixes
 - ... and 639 more: https://git.openjdk.org/valhalla/compare/a4c6473b...ad66cd3b

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - lworld: https://webrevs.openjdk.org/?repo=valhalla&pr=812&range=00.0
 - jdk: https://webrevs.openjdk.org/?repo=valhalla&pr=812&range=00.1

Changes: https://git.openjdk.org/valhalla/pull/812/files
  Stats: 210974 lines in 3145 files changed: 92700 ins; 92071 del; 26203 mod
  Patch: https://git.openjdk.org/valhalla/pull/812.diff
  Fetch: git fetch https://git.openjdk.org/valhalla pull/812/head:pull/812

PR: https://git.openjdk.org/valhalla/pull/812