[jdk24] RFR: 8346739: jpackage tests failed after JDK-8345259

[Severin Gehwolf]

Clean backport of a test follow-up for #22849 targeting JDK 24. Please review! Thanks in advance.

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Commit messages:
 - Backport 7ba969a576eb92446e40587fecf98e1e4aba8883

Changes: https://git.openjdk.org/jdk/pull/22972/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22972&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8346739
  Stats: 7 lines in 3 files changed: 7 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/22972.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22972/head:pull/22972

PR: https://git.openjdk.org/jdk/pull/22972