RFR: Merge openjdk/jdk21u:master

[William Kemper]

Merges tag jdk-21.0.10-ga

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Commit messages:
 - 8375447: Remove designator DEFAULT_PROMOTED_VERSION_PRE=ea for release 21.0.10
 - 8374209: [17u,21u] Backout JDK-8361748 due to JDK-8373727
 - 8359501: Enhance Handling of URIs
 - 8368032: Enhance Certificate Checking
 - 8365280: Enhance JOptionPane
 - 8362632: Improve HttpServer Request handling
 - 8362308: Enhance Bitmap operations
 - 8365271: Improve Swing supports
 - 8365058: Enhance CopyOnWriteArraySet
 - 8364214: Enhance polygon data support
 - ... and 2 more: https://git.openjdk.org/shenandoah-jdk21u/compare/2e594b6c...97a3d237

The merge commit only contains trivial merges, so no merge-specific webrevs have been generated.

Changes: https://git.openjdk.org/shenandoah-jdk21u/pull/232/files
  Stats: 1506 lines in 45 files changed: 989 ins; 299 del; 218 mod
  Patch: https://git.openjdk.org/shenandoah-jdk21u/pull/232.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah-jdk21u.git pull/232/head:pull/232

PR: https://git.openjdk.org/shenandoah-jdk21u/pull/232