Integrated: Merge openjdk/jdk:master

[William Kemper]

Merge tag jdk-21+16

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Commit messages:
 - Merge tag 'jdk-21+16' into merge-jdk-21-16
 - 8305202: Fix Copyright Header in ZonedDateTimeFormatterBenchmark
 - 8304976: Optimize DateTimeFormatterBuilder.ZoneTextPrinterParser.getTree()
 - 8303392: Runtime.exec and ProcessBuilder.start should use System logger
 - 8302814: Delete unused CountLoopEnd instruct with CmpX
 - 8304759: Add BitMap iterators
 - 8304991: Redundant hyphen in @param results in double-dash in javadocs
 - 8304840: Dangling `CharacterCodingException` in a few javadoc descriptions
 - 8303161: [vectorapi] VectorMask.cast narrow operation returns incorrect value with SVE
 - 8272613: CharsetDecoder.decode(ByteBuffer) throws IllegalArgumentException
 - ... and 85 more: https://git.openjdk.org/shenandoah/compare/2785875d...3fce9481

The merge commit only contains trivial merges, so no merge-specific webrevs have been generated.

Changes: https://git.openjdk.org/shenandoah/pull/239/files
  Stats: 16925 lines in 397 files changed: 8138 ins; 6972 del; 1815 mod
  Patch: https://git.openjdk.org/shenandoah/pull/239.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah.git pull/239/head:pull/239

PR: https://git.openjdk.org/shenandoah/pull/239