RFR: Merge openjdk/jdk:master

[William Kemper]

Merges tag jdk-23+8

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Commit messages:
 - 8324174: assert(m->is_entered(current)) failed: invariant
 - 8325042: remove unused JVMDITools test files
 - 8323621: JDK build should exclude snippet class in java.lang.foreign
 - 8324238: [macOS] java/awt/Frame/ShapeNotSetSometimes/ShapeNotSetSometimes.java fails with the shape has not been applied msg
 - 8320342: Use PassFailJFrame for TruncatedPopupMenuTest.java
 - 8324981: Shenandoah: Move commit and soft max heap changed methods into heap
 - 8303374: Implement JEP 455: Primitive Types in Patterns, instanceof, and switch (Preview)
 - 8320712: Rewrite BadFactoryTest in pure Java
 - 8324771: Obsolete RAMFraction related flags
 - 8324970: Serial: Refactor signature of maintain_old_to_young_invariant
 - ... and 61 more: https://git.openjdk.org/shenandoah/compare/6d36eb78...5b9b176c

The webrev contains the conflicts with master:
 - merge conflicts: https://webrevs.openjdk.org/?repo=shenandoah&pr=389&range=00.conflicts

Changes: https://git.openjdk.org/shenandoah/pull/389/files
  Stats: 18822 lines in 1229 files changed: 7186 ins; 1716 del; 9920 mod
  Patch: https://git.openjdk.org/shenandoah/pull/389.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah.git pull/389/head:pull/389

PR: https://git.openjdk.org/shenandoah/pull/389