RFR: Merge openjdk/jdk21u:master [v2]

[William Kemper]

> Merges tag jdk-21.0.8+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 264 commits:

 - Merge tag 'jdk-21.0.8+1' into merge-jdk-21.0.8+1
   
   Added tag jdk-21.0.8+1 for changeset d5a2f7685996
 - 8318700: MacOS Zero cannot run gtests due to wrong JVM path
   
   Backport-of: 744e0893100d402b2b51762d57bcc2e99ab7fdcc
 - 8319690: [AArch64] C2 compilation hits offset_ok_for_immed: assert "c2 compiler bug"
   
   Backport-of: 98f0b86641d84048949ed3da1cb14f3820b01c12
 - 8314236: Overflow in Collections.rotate
   
   Backport-of: 3828dc913a3ea28d622b69bd07f26949128eb5f7
 - 8320687: sun.jvmstat.monitor.MonitoredHost.getMonitoredHost() throws unexpected exceptions when invoked concurrently
   
   Backport-of: 81484d8c0520cf55ec58fc7b4c81880e69537674
 - 8353787: Increased number of SHA-384-Digest java.util.jar.Attributes$Name instances leading to higher memory footprint
   
   Backport-of: b64cdc28132c889ca8e21dc9534590ba2a778bcd
 - 8352706: httpclient HeadTest does not run on HTTP2
   
   Backport-of: e32a0c90feb231d791e6c17e6360f629189cab8b
 - 8330598: java/net/httpclient/Http1ChunkedTest.java fails with java.util.MissingFormatArgumentException: Format specifier '%s'
   
   Backport-of: c9c3c1536880d81ab84d5cb55f4fd0fe3bbf60a2
 - 8343891: Test javax/swing/JTabbedPane/TestJTabbedPaneBackgroundColor.java failed
   
   Backport-of: c2e14b1b304796753bea2eca81aa24ab4b3bf6db
 - 8351086: (fc) Make java/nio/channels/FileChannel/BlockDeviceSize.java test manual
   
   Backport-of: 08929134b3533362133139c4e964b1b28de6ebfb
 - ... and 254 more: https://git.openjdk.org/shenandoah-jdk21u/compare/115e9281...de4a4a11

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

Changes: https://git.openjdk.org/shenandoah-jdk21u/pull/191/files
  Webrev: https://webrevs.openjdk.org/?repo=shenandoah-jdk21u&pr=191&range=01
  Stats: 83554 lines in 1483 files changed: 64677 ins; 8722 del; 10155 mod
  Patch: https://git.openjdk.org/shenandoah-jdk21u/pull/191.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah-jdk21u.git pull/191/head:pull/191

PR: https://git.openjdk.org/shenandoah-jdk21u/pull/191