[lworld] RFR: Merge jdk [v2]

[David Simms]

> Merge jdk-27+8

David Simms has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 96 commits:

 - Merge branch 'lworld' into lworld_merge_jdk_27_8
 - Tweak to 8375569, avoid creating scratch mirror for refined array klass
 - Merge tag 'jdk-27+8' into lworld_merge_jdk_27_8
   
   Added tag jdk-27+8 for changeset 949370ab
 - 8376756: GenShen: Improve encapsulation of generational collection set choosing
   
   Reviewed-by: shade, kdnilsen
 - 8340830: Console.readLine() and Console.printf() are mutually blocking
   
   Reviewed-by: jlu, jpai, rriggs, vyazici
 - 8376405: Virtual thread crash: assert(!_current->is_suspended()) failed: must be
   
   Reviewed-by: sspitsyn, dholmes
 - 8376645: Test java/net/httpclient/http3/H3IdleExceedsQuicIdleTimeout.java failed: no response from peer
   
   Reviewed-by: jpai, dfuchs
 - 8377141: G1: Remove unused local declaration in G1BarrierSetC2
   
   Reviewed-by: tschatzl, shade
 - 8376761: ARM32: Constant base assert after JDK-8373266
   
   Reviewed-by: stefank, ayang, tschatzl
 - 8367530: The exhaustiveness errors could be improved
   
   Reviewed-by: vromero, mcimadamore
 - ... and 86 more: https://git.openjdk.org/valhalla/compare/c27e815e...e3ee38cf

-------------

Changes: https://git.openjdk.org/valhalla/pull/2125/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=2125&range=01
  Stats: 51118 lines in 640 files changed: 25598 ins; 16740 del; 8780 mod
  Patch: https://git.openjdk.org/valhalla/pull/2125.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/2125/head:pull/2125

PR: https://git.openjdk.org/valhalla/pull/2125