[jdk21u-dev] RFR: 8339678: Update runtime/condy tests to be executed with VM flags

[Goetz Lindenmaier]

I backport this for parity with 21.0.8-oracle,

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Commit messages:
 - Backport c3711dc90980fb3e63ff199612c201c4464626bf

Changes: https://git.openjdk.org/jdk21u-dev/pull/1525/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1525&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8339678
  Stats: 21 lines in 6 files changed: 2 ins; 6 del; 13 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1525.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1525/head:pull/1525

PR: https://git.openjdk.org/jdk21u-dev/pull/1525