RFR: Merge openjdk/jdk:master [v2]

[William Kemper]

> Merges tag jdk-23+20

William Kemper has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 202 commits:

 - Merge tag 'jdk-23+20' into merge-jdk-23+20
   
   Added tag jdk-23+20 for changeset 87e864bf
 - 8328703: Illegal accesses in Java_jdk_internal_org_jline_terminal_impl_jna_linux_CLibraryImpl_ioctl0
   
   Reviewed-by: asotona, shade
 - 8331097: Tests build is broken after pr/18914
   
   Reviewed-by: alanb
 - 8329797: Shenandoah: Default case invoked for: "MaxL" (bad AD file)
   
   Reviewed-by: shade, thartmann
 - 8325373: Improve StackCounter error reporting for bad switch cases
   
   Reviewed-by: psandoz
 - 8330815: Use pattern matching for instanceof in KeepAliveCache
   
   Reviewed-by: jpai, djelinski
 - 8331030: langtools/tools/javac/tree tests fail with SOE with fastdebug and -Xcomp
   
   Reviewed-by: jjg, vromero
 - 8322135: Printing JTable in Windows L&F throws InternalError: HTHEME is null
   
   Reviewed-by: abhiscxk, honkar, aivanov
 - 8331018: Clean up non-standard use of /** comments in `jdk.jshell`
   
   Reviewed-by: iris, darcy, jlahoda
 - 8330853: Add missing checks for ConnectionGraph::can_reduce_cmp() call
   
   Reviewed-by: iveresov, dlong, cslucas
 - ... and 192 more: https://git.openjdk.org/shenandoah/compare/6d095910...e030975a

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Changes: https://git.openjdk.org/shenandoah/pull/426/files
  Webrev: https://webrevs.openjdk.org/?repo=shenandoah&pr=426&range=01
  Stats: 64885 lines in 957 files changed: 32327 ins; 27371 del; 5187 mod
  Patch: https://git.openjdk.org/shenandoah/pull/426.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah.git pull/426/head:pull/426

PR: https://git.openjdk.org/shenandoah/pull/426