[master] RFR: Merge jdk:jdk-21+12 [v2]

[Roman Kennke]

> Merging upstream tag jdk-21+12.

Roman Kennke has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 82 commits:

 - Comment-out some unsupported tests.
 - Merge tag 'jdk-21+12'
   
   Added tag jdk-21+12 for changeset 6e19387f
 - 8302065: [Lilliput] Cleanups and touch-ups
   
   Reviewed-by: shade
 - 8301786: [Lilliput] Failing CompressedClassPointerEncoding.java
   
   Reviewed-by: shade
 - Merge jdk:jdk-21+8
   
   Reviewed-by: shade
 - 8301514: [Lilliput] Enable fast-locking with ZGC
   
   Reviewed-by: shade
 - 8301545: [Lilliput] Fix aarch64 interpreter load_nklass()
   
   Reviewed-by: shade
 - 8300888: [Lilliput] Remaining missing parts in the SA
   
   Reviewed-by: shade
 - 8300527: [Lilliput] Simplify and optimize loading of Klass*
   
   Reviewed-by: shade
 - 8300733: [Lilliput] Enable fast-locking for Lilliput
   
   Reviewed-by: shade
 - ... and 72 more: https://git.openjdk.org/lilliput/compare/6e19387f...96929c62

-------------

Changes: https://git.openjdk.org/lilliput/pull/75/files
 Webrev: https://webrevs.openjdk.org/?repo=lilliput&pr=75&range=01
  Stats: 6330 lines in 251 files changed: 4198 ins; 936 del; 1196 mod
  Patch: https://git.openjdk.org/lilliput/pull/75.diff
  Fetch: git fetch https://git.openjdk.org/lilliput pull/75/head:pull/75

PR: https://git.openjdk.org/lilliput/pull/75