RFR: Merge openjdk/jdk21u-dev:master [v2]

[William Kemper]

> Merges tag jdk-21.0.6+0

William Kemper has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 21 commits:

 - Merge remote-tracking branch 'shenandoah-jdk21u/master' into merge-jdk-21.0.6+0
 - 8280120: [IR Framework] Add attribute to @IR to enable/disable IR matching based on the architecture
   
   Backport-of: a8549b63674be433617b986f392e4ff7afef5185
 - 8335409: Can't allocate and retain memory from resource area in frame::oops_interpreted_do oop closure after 8329665
   
   Reviewed-by: phh, stuefe
   Backport-of: 7ab96c74e2c39f430a5c2f65a981da7314a2385b
 - 8338286: GHA: Demote x86_32 to hotspot build only
   
   Backport-of: da7311bbe37c2b9632b117d52a77c659047820b7
 - 8311306: Test com/sun/management/ThreadMXBean/ThreadCpuTimeArray.java failed: out of expected range
   
   Backport-of: e1fd663f224909c09f2f6fab7ad20f7b7864b62b
 - 8322881: java/nio/file/Files/CopyMoveVariations.java fails with AccessDeniedException due to permissions of files in /tmp
   
   Backport-of: bf13a4e2819fa5bcb3e4f2281121d4e0b5535403
 - 8335150: Test LogGeneratedClassesTest.java fails on rpmbuild mock enviroment
   
   Backport-of: 403fa3760f629873258447cc9aefa09f9a27e7a4
 - 8336284: Test TestClhsdbJstackLock.java/TestJhsdbJstackLock.java fails with -Xcomp after JDK-8335743
   
   Backport-of: 1fe3ada001e188754df5de00bf6804f028ad274b
 - 8309894: compiler/vectorapi/VectorLogicalOpIdentityTest.java fails on SVE system with UseSVE=0
   
   Reviewed-by: phh
   Backport-of: 60544f9088c11e4718a9cd77f21792c6ba387440
 - 8316193: jdk/jfr/event/oldobject/TestListenerLeak.java java.lang.Exception: Could not find leak
   
   Backport-of: f6be922952642f40dcf0d27b7896c9a6acdd6378
 - ... and 11 more: https://git.openjdk.org/shenandoah-jdk21u/compare/d2bfbc4e...ea63edc8

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Changes: https://git.openjdk.org/shenandoah-jdk21u/pull/75/files
  Webrev: https://webrevs.openjdk.org/?repo=shenandoah-jdk21u&pr=75&range=01
  Stats: 769 lines in 38 files changed: 473 ins; 125 del; 171 mod
  Patch: https://git.openjdk.org/shenandoah-jdk21u/pull/75.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah-jdk21u.git pull/75/head:pull/75

PR: https://git.openjdk.org/shenandoah-jdk21u/pull/75