RFR: 8354450: Using a File with a path containing a trailing space should fail when alternative data streams are disabled (win) [v4]

[Brian Burkhalter]

> In `java.io.WinNTFileSystem::isInvalid`, replace an insufficient test for file path validity with a sufficient test for file path invalidity. Also, add a new test.

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

  8354450: Simplify test for " \" in path elements

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Changes:
  - all: https://git.openjdk.org/jdk/pull/24635/files
  - new: https://git.openjdk.org/jdk/pull/24635/files/624f4f79..34f7933d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24635&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24635&range=02-03

  Stats: 12 lines in 1 file changed: 0 ins; 6 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/24635.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24635/head:pull/24635

PR: https://git.openjdk.org/jdk/pull/24635