RFR: Merge openjdk/jdk:master

[William Kemper]

Merges tag jdk-24+20

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Commit messages:
 - 8338851: Hoist os::Posix::realpath() to os::realpath() and implement on Windows
 - 8342338: Remove redundant IIOPURLTest.java
 - 8341715: PPC64: ObjectMonitor::_owner should be reset unconditionally in nmethod unlocking
 - 8342042: PPC64: compiler_fast_unlock_object flags failure instead of success
 - 8340279: Open source several AWT Dialog tests - Batch 2
 - 8341072: Open source several AWT Canvas and Rectangle related tests
 - 8341328: Refactor initial Assertion Predicate creation into separate classes
 - 8340313: Crash due to invalid oop in nmethod after C1 patching
 - 8338751: ConfigureNotify behavior has changed in KWin 6.2
 - 8340140: Open some dialog awt tests 3
 - ... and 86 more: https://git.openjdk.org/shenandoah/compare/e7c5bf45...7a64fbbb

The webrev contains the conflicts with master:
 - merge conflicts: https://webrevs.openjdk.org/?repo=shenandoah&pr=519&range=00.conflicts

Changes: https://git.openjdk.org/shenandoah/pull/519/files
  Stats: 24434 lines in 541 files changed: 20214 ins; 1645 del; 2575 mod
  Patch: https://git.openjdk.org/shenandoah/pull/519.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah.git pull/519/head:pull/519

PR: https://git.openjdk.org/shenandoah/pull/519