[lworld] RFR: Merge jdk

[David Simms]

Merge jdk-26+15

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Commit messages:
 - Merge branch 'lworld' into lworld_merge_jdk_26_15
 - Merge jdk
 - 8367268: Remove unused os::numa_topology_changed()
 - 8367066: RISC-V: refine register selection in MacroAssembler:: decode_klass_not_null
 - 8366951: Test runtime/logging/StressAsyncUL.java is timing out
 - 8366342: Key generator and key pair generator tests skipping, but showing as passed
 - 8367243: Format issues with dist dump debug output in PhaseGVN::dead_loop_check
 - 8366702: C2 SuperWord: refactor VTransform vector nodes
 - 8361530: Test javax/swing/GraphicsConfigNotifier/StalePreferredSize.java timed out
 - 8367293: RISC-V: enable vectorapi test for VectorMask.laneIsSet
 - ... and 102 more: https://git.openjdk.org/valhalla/compare/849c84dd...a2296c29

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - lworld: https://webrevs.openjdk.org/?repo=valhalla&pr=1678&range=00.0
 - jdk: https://webrevs.openjdk.org/?repo=valhalla&pr=1678&range=00.1

Changes: https://git.openjdk.org/valhalla/pull/1678/files
  Stats: 19179 lines in 590 files changed: 9565 ins; 6574 del; 3040 mod
  Patch: https://git.openjdk.org/valhalla/pull/1678.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1678/head:pull/1678

PR: https://git.openjdk.org/valhalla/pull/1678