RFR: Merge openjdk/jdk21u-dev:master

[William Kemper]

Merges tag jdk-21.0.3-ga

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Commit messages:
 - 8329838: [21u] Remove designator DEFAULT_PROMOTED_VERSION_PRE=ea for release 21.0.3
 - 8319851: Improve exception logging
 - 8322122: Enhance generation of addresses
 - 8318340: Improve RSA key implementations
 - 8315708: Enhance HTTP/2 client usage

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

Changes: https://git.openjdk.org/shenandoah-jdk21u/pull/36/files
  Stats: 173 lines in 19 files changed: 48 ins; 51 del; 74 mod
  Patch: https://git.openjdk.org/shenandoah-jdk21u/pull/36.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah-jdk21u.git pull/36/head:pull/36

PR: https://git.openjdk.org/shenandoah-jdk21u/pull/36