RFR: 8368165: (fs) Path.toRealPath does not perform correctly for symbolic links in a mapped drive (win) [v3]

[Brian Burkhalter]

> If `getFinalPath` throws an exception, or converts a drive path to a UNC path, then fall back to the slow path which uses `resolveAllLinks`.

Brian Burkhalter has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:

 - Merge
 - 8368165: Improve fallback mechanism when a link cannot be opened for attribute access
 - 8368165: (fs) Path.toRealPath does not perform correctly for symbolic links in a mapped drive (win)

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/28032/files
  - new: https://git.openjdk.org/jdk/pull/28032/files/891561f6..ba3952dc

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28032&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28032&range=01-02

  Stats: 413918 lines in 6117 files changed: 261573 ins; 88231 del; 64114 mod
  Patch: https://git.openjdk.org/jdk/pull/28032.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28032/head:pull/28032

PR: https://git.openjdk.org/jdk/pull/28032