[lworld] RFR: Merge jdk

[David Simms]

Merge jdk-26+7

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

Commit messages:
 - Merge branch 'lworld' into lworld_merge_jdk_26_7
 - @since latest incorrect
 - Missed merge result (accept ours)
 - Merge tag 'jdk-26+7' into lworld_merge_jdk_26_7
 - 8309399: JVMTI spec needs to clarify when OPAQUE_FRAME is thrown for reasons other than a native method
 - 8357226: Remove unnecessary List.indexOf from RepaintManager.removeInvalidComponent
 - 8360288: Shenandoah crash at size_given_klass in op_degenerated
 - 8362336: Revert changes in metaspaceShared.cpp done via JDK-8356807
 - 8362276: NMT tests should have locks for the entire tests
 - 8361076: Add benchmark for ImageReader in preparation for Valhalla changes
 - ... and 87 more: https://git.openjdk.org/valhalla/compare/bc7a3d63...51423632

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - lworld: https://webrevs.openjdk.org/?repo=valhalla&pr=1604&range=00.0
 - jdk: https://webrevs.openjdk.org/?repo=valhalla&pr=1604&range=00.1

Changes: https://git.openjdk.org/valhalla/pull/1604/files
  Stats: 17686 lines in 505 files changed: 10432 ins; 4840 del; 2414 mod
  Patch: https://git.openjdk.org/valhalla/pull/1604.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1604/head:pull/1604

PR: https://git.openjdk.org/valhalla/pull/1604