[master] RFR: Merge jdk:jdk-26+7 [v2]

[Roman Kennke]

> As title says.

Roman Kennke has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 98 commits:

 - 8347710: [Lilliput] Implement 4 byte headers
   
   Reviewed-by: stuefe
 - 8320761: [Lilliput] Implement compact identity hashcode
   
   Reviewed-by: stuefe
 - 8347711: [Lilliput] Parallel GC support for compact identity hashcode
   
   Reviewed-by: stuefe
 - 8346011: [Lilliput] Compact Full-GC Forwarding
   
   Reviewed-by: stuefe
 - Merge branch 'master' into merge-jdk-26+7
 - 8309399: JVMTI spec needs to clarify when OPAQUE_FRAME is thrown for reasons other than a native method
   
   Reviewed-by: cjplummer
 - 8357226: Remove unnecessary List.indexOf from RepaintManager.removeInvalidComponent
   
   Reviewed-by: azvegint, serb
 - 8360288: Shenandoah crash at size_given_klass in op_degenerated
   
   Reviewed-by: shade
 - 8362336: Revert changes in metaspaceShared.cpp done via JDK-8356807
   
   Reviewed-by: iklam
 - 8362276: NMT tests should have locks for the entire tests
   
   Reviewed-by: shade, coleenp
 - ... and 88 more: https://git.openjdk.org/lilliput/compare/cc42b372...9ef8f3f0

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Changes: https://git.openjdk.org/lilliput/pull/202/files
  Webrev: https://webrevs.openjdk.org/?repo=lilliput&pr=202&range=01
  Stats: 18778 lines in 506 files changed: 11524 ins; 4843 del; 2411 mod
  Patch: https://git.openjdk.org/lilliput/pull/202.diff
  Fetch: git fetch https://git.openjdk.org/lilliput.git pull/202/head:pull/202

PR: https://git.openjdk.org/lilliput/pull/202