[master] RFR: Merge jdk:jdk-25+9 [v3]

[Roman Kennke]

> Merging upstream jdk-25+9 and re-applying/merging the 3 Lilliput patches on-top.

Roman Kennke has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains two new commits since the last revision:

 - 8347710: [Lilliput] Implement 4 byte headers
   
   Reviewed-by: stuefe
 - 8320761: [Lilliput] Implement compact identity hashcode
   
   Reviewed-by: stuefe

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Changes:
  - all: https://git.openjdk.org/lilliput/pull/194/files
  - new: https://git.openjdk.org/lilliput/pull/194/files/3fb7b314..87ff03f6

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=lilliput&pr=194&range=02
 - incr: https://webrevs.openjdk.org/?repo=lilliput&pr=194&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/lilliput/pull/194.diff
  Fetch: git fetch https://git.openjdk.org/lilliput.git pull/194/head:pull/194

PR: https://git.openjdk.org/lilliput/pull/194