RFR: Merge openjdk/jdk:master

[William Kemper]

Merges tag jdk-22+9. Includes fixes to GHA infrastructure.

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Commit messages:
 - Merge tag 'jdk-22+9' into merge-jdk-22-9
 - 8306582: Remove MetaspaceShared::exit_after_static_dump()
 - 8313368: (fc) FileChannel.size returns 0 on block special files
 - 8312078: [PPC] JcmdScale.java Failing on AIX
 - 8312617: SIGSEGV in ConnectionGraph::verify_ram_nodes
 - 8313322: RISC-V: implement MD5 intrinsic
 - 8313593: Generational ZGC: NMT assert when the heap fails to expand
 - 8313402: C1: Incorrect LoadIndexed value numbering
 - 8311989: Test java/lang/Thread/virtual/Reflection.java timed out
 - 8310311: Serial: move Generation::contribute_scratch to DefNewGeneration
 - ... and 101 more: https://git.openjdk.org/shenandoah/compare/6ca2eeaa...1219a6af

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

Changes: https://git.openjdk.org/shenandoah/pull/303/files
  Stats: 14244 lines in 454 files changed: 7487 ins; 3171 del; 3586 mod
  Patch: https://git.openjdk.org/shenandoah/pull/303.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah.git pull/303/head:pull/303

PR: https://git.openjdk.org/shenandoah/pull/303