[master] RFR: Merge jdk:jdk-26+5

[Roman Kennke]

Merging jdk-26+5
Fixed some minor issues
Re-order patches to make more sense and get clean builds and tests after each patch

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Commit messages:
 - 8347710: [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
 - Merge branch 'master' into merge-jdk-26+5
 - 8277394: Remove the use of safepoint_workers in reference processor
 - 8361198: [AIX] fix misleading error output in thread_cpu_time_unchecked
 - 8361060: Keep track of the origin server against which a jdk.internal.net.http.HttpConnection was constructed
 - 8361037: [ubsan] compiler/c2/irTests/TestFloat16ScalarOperations division by 0
 - 8359602: Ideal optimizations depending on input type are missed because of missing notification mechanism from CCP
 - ... and 715 more: https://git.openjdk.org/lilliput/compare/84840c01...1426d2f3

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - master: https://webrevs.openjdk.org/?repo=lilliput&pr=200&range=00.0
 - jdk:jdk-26+5: https://webrevs.openjdk.org/?repo=lilliput&pr=200&range=00.1

Changes: https://git.openjdk.org/lilliput/pull/200/files
  Stats: 187017 lines in 3117 files changed: 111844 ins; 52434 del; 22739 mod
  Patch: https://git.openjdk.org/lilliput/pull/200.diff
  Fetch: git fetch https://git.openjdk.org/lilliput.git pull/200/head:pull/200

PR: https://git.openjdk.org/lilliput/pull/200