[jdk21u] Integrated: 8312166: (dc) DatagramChannel's socket adaptor does not release carrier thread when blocking in receive

[Rob McKenna]

backport 8312166

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Commit messages:
 - Backport 028068a655bb08e016e7a915c2b2f6abc1e480a0

Changes: https://git.openjdk.org/jdk21u/pull/167/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u&pr=167&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8312166
  Stats: 464 lines in 3 files changed: 269 ins; 141 del; 54 mod
  Patch: https://git.openjdk.org/jdk21u/pull/167.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u.git pull/167/head:pull/167

PR: https://git.openjdk.org/jdk21u/pull/167