RFR: 8262742: (fs) Add Path::resolve with varargs string

[Brian Burkhalter]

Add to `java.nio.file.Path` methods which allow resolution of multiple descendants.

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Commit messages:
 - 8262742: (fs) Add Path::resolve with varargs string

Changes: https://git.openjdk.org/jdk/pull/14805/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14805&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8262742
  Stats: 219 lines in 3 files changed: 218 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/14805.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14805/head:pull/14805

PR: https://git.openjdk.org/jdk/pull/14805