[jdk21u-dev] RFR: 8263256: Test java/net/Inet6Address/serialize/Inet6AddressSerializationTest.java fails due to dynamic reconfigurations of network interface during test

[Aleksey Shipilev]

Clean backport to improve test and parity with 21.0.3-oracle.

Additional testing:
 - [x] Affected tests still pass

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Commit messages:
 - Backport 0048f1da4ce83b3de5d5ac074f969437f7b3024e

Changes: https://git.openjdk.org/jdk21u-dev/pull/19/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=19&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8263256
  Stats: 18 lines in 1 file changed: 14 ins; 1 del; 3 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/19.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/19/head:pull/19

PR: https://git.openjdk.org/jdk21u-dev/pull/19