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

[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

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Commit messages:
 - wq8347710: [Lilliput] Implement 4 byte headers
 - 8320761: [Lilliput] Implement compact identity hashcode
 - 8347711: [Lilliput] Parallel GC support for compact identity hashcode
 - 8346011: [Lilliput] Compact Full-GC Forwarding
 - 8352654: [REDO] nsk/jvmti/ tests should fail when  nsk_jvmti_setFailStatus() is called
 - 8298432: Investigate the benefits of usage of GetPrimitiveArrayCritical in the cmm code
 - 8372380: Make hs_err reporting more robust for unattached threads
 - 8350938: ResourceParsingClassHierarchyResolver inflates all Utf8 CP entries
 - 8371637: allocateNativeInternal sometimes return incorrectly aligned memory
 - 8371571: Consolidate and enhance bulk memory segment ops benchmarks
 - ... and 1868 more: https://git.openjdk.org/lilliput/compare/6f12fc01...c18a0aac

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - master: https://webrevs.openjdk.org/?repo=lilliput&pr=206&range=00.0
 - jdk:jdk-26+26: https://webrevs.openjdk.org/?repo=lilliput&pr=206&range=00.1

Changes: https://git.openjdk.org/lilliput/pull/206/files
  Stats: 634533 lines in 7087 files changed: 432084 ins; 130328 del; 72121 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