[lilliput-jdk21u:lilliput] RFR: 8329091: [Lilliput/JDK21] Fix tests after LM_LIGHTWEIGHT backports

[Roman Kennke]

A few tests explicitely test LM_LIGHTWEIGHT locking-mode. In JDK22, LM_LIGHTWEIGHT became a non-experimental product option. Some tests that have been backported from JDK>=22 requires -XX:+UnlockExperimentalVMOptions in JDK21.

Testing:
 - [ ] tier1
 - [ ] tier2

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

Commit messages:
 - 8329091: [Lilliput/JDK21] Fix tests after LM_LIGHTWEIGHT backports

Changes: https://git.openjdk.org/lilliput-jdk21u/pull/29/files
  Webrev: https://webrevs.openjdk.org/?repo=lilliput-jdk21u&pr=29&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8329091
  Stats: 6 lines in 3 files changed: 0 ins; 0 del; 6 mod
  Patch: https://git.openjdk.org/lilliput-jdk21u/pull/29.diff
  Fetch: git fetch https://git.openjdk.org/lilliput-jdk21u.git pull/29/head:pull/29

PR: https://git.openjdk.org/lilliput-jdk21u/pull/29