RFR: 8371689: (fs) CopyMoveHelper.copyToForeignTarget use of sourcePosixView is confusing [v3]

[Brian Burkhalter]

> In `CopyMoveHelper`, replace `PosixFileAttributeView` with a `boolean`.

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

  8371689: Determine posix attributes support based on the view being retrievable

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Changes:
  - all: https://git.openjdk.org/jdk/pull/28304/files
  - new: https://git.openjdk.org/jdk/pull/28304/files/bebf4a5b..ad290848

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28304&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28304&range=01-02

  Stats: 10 lines in 1 file changed: 4 ins; 4 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/28304.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28304/head:pull/28304

PR: https://git.openjdk.org/jdk/pull/28304