RFR: Merge openjdk/jdk21u:master

Thu Sep 25 14:31:30 UTC 2025

Merges tag jdk-21.0.9+8

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Commit messages:
 - 8367388: Tests start to fail on JDK-21 after JDK-8351907

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

Changes: https://git.openjdk.org/shenandoah-jdk21u/pull/223/files
  Stats: 7 lines in 1 file changed: 6 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/shenandoah-jdk21u/pull/223.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah-jdk21u.git pull/223/head:pull/223

PR: https://git.openjdk.org/shenandoah-jdk21u/pull/223