[lworld] RFR: Merge jdk [v2]

[David Simms]

> Merge tag 'jdk-21+1'

David Simms has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 1479 commits:

 - 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 1469 more: https://git.openjdk.org/valhalla/compare/175e3d3f...ad66cd3b

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Changes: https://git.openjdk.org/valhalla/pull/812/files
 Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=812&range=01
  Stats: 200602 lines in 1553 files changed: 191912 ins; 2006 del; 6684 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