[master] RFR: Merge jdk:jdk-25+21

[Roman Kennke]

As title says

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Commit messages:
 - 8347711: [Lilliput] Parallel GC support for compact identity hashcode
 - 8347710: [Lilliput] Implement 4 byte headers
 - 8320761: [Lilliput] Implement compact identity hashcode
 - 8346011: [Lilliput] Compact Full-GC Forwarding
 - Merge branch 'master' into merge-jdk-25+21
 - 8355569: Some nsk/jdi tests can glean the "main" thread by using the ClassPrepareEvent for the debuggee main class
 - 8297727: Forcing LF interpretation lead to StackOverflowError in reflection code
 - 8355956: Prepare javap for class file format aware access flag parsing
 - 8355650: Remove unused fields in ParkEvent
 - 8355971: Build warnings after the changes for JDK-8354996
 - ... and 496 more: https://git.openjdk.org/lilliput/compare/e4526b07...f12d5cd5

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - master: https://webrevs.openjdk.org/?repo=lilliput&pr=198&range=00.0
 - jdk:jdk-25+21: https://webrevs.openjdk.org/?repo=lilliput&pr=198&range=00.1

Changes: https://git.openjdk.org/lilliput/pull/198/files
  Stats: 298137 lines in 2634 files changed: 91064 ins; 197227 del; 9846 mod
  Patch: https://git.openjdk.org/lilliput/pull/198.diff
  Fetch: git fetch https://git.openjdk.org/lilliput.git pull/198/head:pull/198

PR: https://git.openjdk.org/lilliput/pull/198