RFR: 8368156: java/nio/file/Files/IsSameFile.java failing (win) [v2]

[Brian Burkhalter]

> Use try-with-resources to ensure that the FileSystem `zipfs` is closed when no longer needed. This fixes the issue at hand. Other changes are to simplify cleanup of test files.

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

  8368156: Address reviewer comments

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Changes:
  - all: https://git.openjdk.org/jdk/pull/27440/files
  - new: https://git.openjdk.org/jdk/pull/27440/files/407cb87e..7ace52e5

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27440&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27440&range=00-01

  Stats: 17 lines in 1 file changed: 1 ins; 13 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/27440.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27440/head:pull/27440

PR: https://git.openjdk.org/jdk/pull/27440