RFR: Merge openjdk/jdk:master [v2]

[William Kemper]

> Merges tag jdk-22+15

William Kemper has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 99 commits:

 - Merge tag 'jdk-22+15' into merge-jdk-22+15
   
   Added tag jdk-22+15 for changeset ce93d27f
 - 6228794: java.text.ChoiceFormat pattern behavior is not well documented.
   
   Reviewed-by: naoto
 - 8314226: Series of colon-style fallthrough switch cases with guards compiled incorrectly
   
   Reviewed-by: mcimadamore, vromero
 - 8316087: Test SignedLoggerFinderTest.java is still failing
   
   Reviewed-by: dfuchs
 - 8315934: RISC-V: Disable conservative fences per vendor
   
   Reviewed-by: rehn, mli, fyang
 - 8316021: Serial: Remove unused Generation::post_compact
   
   Reviewed-by: tschatzl
 - 8316050: Use hexadecimal encoding in MemorySegment::toString
   
   Reviewed-by: rriggs, mcimadamore
 - 8314612: TestUnorderedReduction.java fails with -XX:MaxVectorSize=32 and -XX:+AlignVector
   
   Reviewed-by: chagedorn, kvn
 - 8311207: Cleanup for Optimization for UUID.toString
   
   Reviewed-by: liach, rriggs
 - 8315898: Open source swing JMenu tests
   
   Reviewed-by: serb
 - ... and 89 more: https://git.openjdk.org/shenandoah/compare/ba88eb1d...94bb1e88

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Changes: https://git.openjdk.org/shenandoah/pull/323/files
 Webrev: https://webrevs.openjdk.org/?repo=shenandoah&pr=323&range=01
  Stats: 24505 lines in 1389 files changed: 12059 ins; 8356 del; 4090 mod
  Patch: https://git.openjdk.org/shenandoah/pull/323.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah.git pull/323/head:pull/323

PR: https://git.openjdk.org/shenandoah/pull/323