[jdk23u] RFR: 8341261: Tests assume UnlockExperimentalVMOptions is disabled by default

[Todd V. Jonker]

Clean backport of test changes that ease Graal integration.

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Commit messages:
 - Backport 1bdd79e7b2086197ab64161e89bbe8cc180f07ed

Changes: https://git.openjdk.org/jdk23u/pull/137/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk23u&pr=137&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8341261
  Stats: 64 lines in 3 files changed: 44 ins; 6 del; 14 mod
  Patch: https://git.openjdk.org/jdk23u/pull/137.diff
  Fetch: git fetch https://git.openjdk.org/jdk23u.git pull/137/head:pull/137

PR: https://git.openjdk.org/jdk23u/pull/137