[jdk21u-dev] RFR: 8325542: CTW: Runner can produce negative StressSeed

[Aleksey Shipilev]

Backporting to streamline tests and parity.

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Commit messages:
 - Backport bb675afae6876fb99aaf0160298463008a9c5efa

Changes: https://git.openjdk.org/jdk21u-dev/pull/860/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=860&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8325542
  Stats: 3 lines in 1 file changed: 1 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/860.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/860/head:pull/860

PR: https://git.openjdk.org/jdk21u-dev/pull/860