RFR: 8333526: Restructure java/nio/channels/DatagramChannel/StressNativeSignal.java to a fail fast exception handling policy [v2]

[serhiysachkov]

> This task addresses the restructuring of the test to handle exception, especially during test setup, in a more immediate "fail fast" manner.

serhiysachkov has updated the pull request incrementally with one additional commit since the last revision:

  review comments: changing ports to 0 as requested

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Changes:
  - all: https://git.openjdk.org/jdk/pull/27294/files
  - new: https://git.openjdk.org/jdk/pull/27294/files/be1f24c1..aa644f58

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27294&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27294&range=00-01

  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/27294.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27294/head:pull/27294

PR: https://git.openjdk.org/jdk/pull/27294