RFR: 8360411: [TEST] open/test/jdk/java/io/File/MaxPathLength.java Refactor extract method to encapsulate Windows specific test logic

[Darragh Conway]

Refactored extract method to encapsulate Windows specific test logic

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Commit messages:
 - 8360411:[TEST] open/test/jdk/java/io/File/MaxPathLength.java Refactor extract method to encapsulate Windows specific

Changes: https://git.openjdk.org/jdk/pull/26193/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26193&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8360411
  Stats: 20 lines in 1 file changed: 11 ins; 7 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/26193.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26193/head:pull/26193

PR: https://git.openjdk.org/jdk/pull/26193