RFR: Merge openjdk/jdk21u:master

[William Kemper]

Merges tag jdk-21.0.9+3

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Commit messages:
 - 8361212: Remove AffirmTrust root CAs
 - 8360647: [XWayland] [OL10] NumPad keys are not triggered
 - 8358701: Remove misleading javax.management.remote API doc wording about JMX spec, and historic link to JMXMP
 - 8328570: Convert closed JViewport manual applet tests to main
 - 8328631: Convert java/awt/InputMethods/InputMethodsTest/InputMethodsTest.java applet test to manual
 - 8328401: Convert java/awt/Frame/InitialMaximizedTest/InitialMaximizedTest.html applet test to automated
 - 8328328: Convert javax/swing/JTabbedPane/4666224/bug4666224.java applet test to main
 - 8328035: Convert javax/swing/text/html/TableView/7030332/bug7030332.java applet test to main
 - 8328225: Convert ImageDecoratedDnD.html applet test to main
 - 8328386: Convert java/awt/FileDialog/FileNameOverrideTest test to main
 - ... and 210 more: https://git.openjdk.org/shenandoah-jdk21u/compare/54f20959...d90297a8

The webrev contains the conflicts with master:
 - merge conflicts: https://webrevs.openjdk.org/?repo=shenandoah-jdk21u&pr=210&range=00.conflicts

Changes: https://git.openjdk.org/shenandoah-jdk21u/pull/210/files
  Stats: 36393 lines in 756 files changed: 19716 ins; 13027 del; 3650 mod
  Patch: https://git.openjdk.org/shenandoah-jdk21u/pull/210.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah-jdk21u.git pull/210/head:pull/210

PR: https://git.openjdk.org/shenandoah-jdk21u/pull/210