RFR: 8347171: (dc) java/nio/channels/DatagramChannel/InterruptibleOrNot.java fails with virtual thread factory

[Brian Burkhalter]

Do not run `testInterruptBeforeUninterruptibleReceive` when the thread is virtual.

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Commit messages:
 - 8347171: (dc) java/nio/channels/DatagramChannel/InterruptibleOrNot.java fails with virtual thread factory

Changes: https://git.openjdk.org/jdk/pull/22981/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22981&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8347171
  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/22981.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22981/head:pull/22981

PR: https://git.openjdk.org/jdk/pull/22981