RFR: 8341282: (fs) Move creation time fallback logic to Java layer (Linux)

[Brian Burkhalter]

Move the decision as to whether `BasicFileAttributes.creationTime()` falls back to the modified time from the native layer to the Java layer.

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Commit messages:
 - 8341282: (fs) Move creation time fallback logic to Java layer (Linux)

Changes: https://git.openjdk.org/jdk/pull/21274/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21274&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8341282
  Stats: 20 lines in 2 files changed: 5 ins; 2 del; 13 mod
  Patch: https://git.openjdk.org/jdk/pull/21274.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21274/head:pull/21274

PR: https://git.openjdk.org/jdk/pull/21274