[jdk17u-dev] RFR: 8294193: Files.createDirectories throws FileAlreadyExistsException for a symbolic link whose target is an existing directory

[Goetz Lindenmaier]

I backport this for parity with 17.0.14-oracle.

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Commit messages:
 - Backport 169a5d48afbc6627f36a768c17c2a5e56219d9c7

Changes: https://git.openjdk.org/jdk17u-dev/pull/2870/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2870&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8294193
  Stats: 161 lines in 3 files changed: 124 ins; 34 del; 3 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2870.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2870/head:pull/2870

PR: https://git.openjdk.org/jdk17u-dev/pull/2870