RFR: 8325201: (zipfs) Disable TestPosix.setPermissionsShouldConvertToUnix which fails on Windows

[Eirik Bjørsnøs]

Can I please get a review for this trivial change to disable the test `TestPosix.setPermissionsShouldConvertToUnix`?

This test was recently introduced in [JDK-8324635](https://bugs.openjdk.org/browse/JDK-8324635), but fails intermittently on Windows CI runs. (See [JDK-8325199](https://bugs.openjdk.org/browse/JDK-8325199))

To reduce CI noise, I suggest we simply add `@Disabled` for now on the failing test.  The actual fix of the failing test will be investigated and fixed as a follow-up PR.

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Commit messages:
 - TestPosix.setPermissionsShouldConvertToUnix fails intermittently on Windows. Disable for now.

Changes: https://git.openjdk.org/jdk/pull/17700/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17700&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8325201
  Stats: 2 lines in 1 file changed: 2 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/17700.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17700/head:pull/17700

PR: https://git.openjdk.org/jdk/pull/17700