[jdk21u-dev] RFR: 8310807: java/nio/channels/DatagramChannel/Connect.java timed out

[Aleksey Shipilev]

Clean backport to improve the test and parity for 21.0.3-oracle.

Additional testing:
 - [x] Affected test still passes

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Commit messages:
 - Backport 570dffb104fc37f053fcdf38a24aa2cabdc921c0

Changes: https://git.openjdk.org/jdk21u-dev/pull/15/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=15&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8310807
  Stats: 79 lines in 1 file changed: 43 ins; 0 del; 36 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/15.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/15/head:pull/15

PR: https://git.openjdk.org/jdk21u-dev/pull/15