RFR: Merge openjdk/jdk21u:master [v2]

[William Kemper]

> Merges tag jdk-21.0.7+1

William Kemper has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 168 commits:

 - Merge branch 'master' into merge-jdk-21.0.7+1
 - 8345468: test/jdk/javax/swing/JScrollBar/4865918/bug4865918.java fails in ubuntu22.04
   
   Backport-of: 6f307623568efe4d90942cd22ec9a26b2e1ca1b1
 - 8348625: [21u, 17u] Revert JDK-8185862 to restore old java.awt.headless behavior on Windows
   
   Reviewed-by: sgehwolf
 - 8347427: JTabbedPane/8134116/Bug8134116.java has no license header
   
   Backport-of: f67b703625afa2e049c572978d29ac00d8c956d3
 - 8332494: java/util/zip/EntryCount64k.java failing with java.lang.RuntimeException: '\\A\\Z' missing from stderr
   
   Backport-of: f5ab7dff402a3152f5d5736cc6521b4be617eccf
 - 8343378: Exceptions in javax/management DeadLockTest.java do not cause test failure
   
   Backport-of: 4a70c83bd0c563185123ce9d8a34e006c62db7cc
 - 8327986: ASAN reports use-after-free in DirectivesParserTest.empty_object_vm
   
   Reviewed-by: rrich
   Backport-of: 47f33a59eaaffc74881fcc9e29d13ff9b2538c2a
 - 8328387: Convert java/awt/Frame/FrameStateTest/FrameStateTest.html applet test to main
   
   Backport-of: 269163d509ec3c80983f55c5b47f472fa76be26c
 - 8327098: GTest needs larger combination limit
   
   Backport-of: c901da48e30d53cb8e4e3c1f0584c5f2d3d095f1
 - 8315486: vmTestbase/nsk/jdwp/ThreadReference/ForceEarlyReturn/forceEarlyReturn002/forceEarlyReturn002.java timed out
   
   Backport-of: 041510dc21df36d9860f4f0048241c2cabb55ee7
 - ... and 158 more: https://git.openjdk.org/shenandoah-jdk21u/compare/ceaeb7b4...c2a2d6ce

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Changes: https://git.openjdk.org/shenandoah-jdk21u/pull/154/files
  Webrev: https://webrevs.openjdk.org/?repo=shenandoah-jdk21u&pr=154&range=01
  Stats: 61769 lines in 574 files changed: 15344 ins; 6744 del; 39681 mod
  Patch: https://git.openjdk.org/shenandoah-jdk21u/pull/154.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah-jdk21u.git pull/154/head:pull/154

PR: https://git.openjdk.org/shenandoah-jdk21u/pull/154