[jdk21u-dev] RFR: 8327650: Test java/nio/channels/DatagramChannel/StressNativeSignal.java timed out

[Andrew Lu]

I backport this for parity with 21.0.5-oracle.

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Commit messages:
 - Backport 7acfba288ff4d1f43cc36506b2bd2d32107b00c2

Changes: https://git.openjdk.org/jdk21u-dev/pull/722/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=722&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8327650
  Stats: 110 lines in 1 file changed: 74 ins; 10 del; 26 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/722.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/722/head:pull/722

PR: https://git.openjdk.org/jdk21u-dev/pull/722