[jdk21u-dev] RFR: 8315406: [REDO] serviceability/jdwp/AllModulesCommandTest.java ignores VM flags

[Goetz Lindenmaier]

I backport this to keep the 21u test suite up-to-date. This will simplify future test backports.

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Commit messages:
 - Backport 5cbff2460812fee707f9d96ab00a628d1ce3fbef

Changes: https://git.openjdk.org/jdk21u-dev/pull/61/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=61&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315406
  Stats: 63 lines in 3 files changed: 3 ins; 50 del; 10 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/61.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/61/head:pull/61

PR: https://git.openjdk.org/jdk21u-dev/pull/61