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

[Roman Kennke]

> Merge upstream tag jdk-26+26
> 
> There is a remaining regression that I have no time to investigate at the moment, I filed a bug to track it: https://bugs.openjdk.org/browse/JDK-8373698
> 
> Testing:
>  - [x] tier1 -UCOH
>  - [X] tier1 +UCOH

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 one new commit since the last revision:

  wq8347710: [Lilliput] Implement 4 byte headers
  
  Reviewed-by: stuefe

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

Changes:
  - all: https://git.openjdk.org/lilliput/pull/206/files
  - new: https://git.openjdk.org/lilliput/pull/206/files/c18a0aac..50ba40b4

Webrevs:
 - full: Webrev is not available because diff is too large
 - incr: https://webrevs.openjdk.org/?repo=lilliput&pr=206&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/lilliput/pull/206.diff
  Fetch: git fetch https://git.openjdk.org/lilliput.git pull/206/head:pull/206

PR: https://git.openjdk.org/lilliput/pull/206