RFR: Merge openjdk/jdk21u:master

[William Kemper]

Merges tag jdk-21.0.10+3

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Commit messages:
 - 8366844: Update and automate MouseDraggedOriginatedByScrollBarTest.java
 - 8365790: Shutdown hook for application image does not work on Windows
 - 8366229: runtime/Thread/TooSmallStackSize.java runs with all collectors
 - 8353661: Open source several swing tests batch5
 - 8351359: OperatingSystemMXBean: values from getCpuLoad and getProcessCpuLoad are stale after 24.8 days (Windows)
 - 8333569: jpackage tests must run app launchers with retries on Linux only
 - 8310915: Typo in aarch64.ad: "envcodings"
 - 8347300: Don't exclude the "PATH" var from the environment when running app launchers in jpackage tests
 - 8327856: Convert applet test SpanishDiacriticsTest.java to a main program
 - 8327757: Convert javax/swing/JSlider/6524424/bug6524424.java applet to main
 - ... and 291 more: https://git.openjdk.org/shenandoah-jdk21u/compare/7f146482...46687d38

The webrev contains the conflicts with master:
 - merge conflicts: https://webrevs.openjdk.org/?repo=shenandoah-jdk21u&pr=228&range=00.conflicts

Changes: https://git.openjdk.org/shenandoah-jdk21u/pull/228/files
  Stats: 66959 lines in 3074 files changed: 38487 ins; 10889 del; 17583 mod
  Patch: https://git.openjdk.org/shenandoah-jdk21u/pull/228.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah-jdk21u.git pull/228/head:pull/228

PR: https://git.openjdk.org/shenandoah-jdk21u/pull/228