RFR: Merge openjdk/jdk21u-dev:master

[William Kemper]

Merges tag jdk-21.0.5+1

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Commit messages:
 - 8337038: Test java/nio/file/attribute/BasicFileAttributeView/CreationTime.java shoud set as /native
 - 8335283: Build failure due to 'no_sanitize' attribute directive ignored
 - 8332903: ubsan: opto/output.cpp:1002:18: runtime error: load of value 171, which is not a valid value for type 'bool'
 - 8269657: Test java/nio/channels/DatagramChannel/Loopback.java failed: Unexpected message
 - 8326332: Unclosed inline tags cause misalignment in summary tables
 - 8333361: ubsan,test : libHeapMonitorTest.cpp:518:9: runtime error: null pointer passed as argument 2, which is declared to never be null
 - 8334769: Shenandoah: Move CodeCache_lock close to its use in ShenandoahConcurrentNMethodIterator
 - 8310628: GcInfoBuilder.c missing JNI Exception checks
 - 8316131: runtime/cds/appcds/TestParallelGCWithCDS.java fails with JNI error
 - 8334339: Test java/nio/file/attribute/BasicFileAttributeView/CreationTime.java fails on alinux3
 - ... and 259 more: https://git.openjdk.org/shenandoah-jdk21u/compare/a0b3c6cd...2c9f741d

The webrev contains the conflicts with master:
 - merge conflicts: https://webrevs.openjdk.org/?repo=shenandoah-jdk21u&pr=70&range=00.conflicts

Changes: https://git.openjdk.org/shenandoah-jdk21u/pull/70/files
  Stats: 46611 lines in 811 files changed: 28490 ins; 14335 del; 3786 mod
  Patch: https://git.openjdk.org/shenandoah-jdk21u/pull/70.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah-jdk21u.git pull/70/head:pull/70

PR: https://git.openjdk.org/shenandoah-jdk21u/pull/70