[jdk23u] RFR: 8324672: Update jdk/java/time/tck/java/time/TCKInstant.java now() to be more robust

[Shivangi Gupta]

Straight Backport. Test passed.

-------------

Commit messages:
 - Backport e94e3bba3932f3d92c0a135d333d1ccd6e72b964

Changes: https://git.openjdk.org/jdk23u/pull/205/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk23u&pr=205&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8324672
  Stats: 16 lines in 1 file changed: 11 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk23u/pull/205.diff
  Fetch: git fetch https://git.openjdk.org/jdk23u.git pull/205/head:pull/205

PR: https://git.openjdk.org/jdk23u/pull/205