[jdk17u-dev] RFR: 8301247: JPackage app-image exe launches multiple exe's in JDK 17+

[Goetz Lindenmaier]

I backport this for parity with 17.0.10-oracle.

Change applies clean, but I had to rework the tests to make it compile with Java 17.

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Commit messages:
 - Backport dcea9bf087c87548d9caa899c52e95d17478da22

Changes: https://git.openjdk.org/jdk17u-dev/pull/1859/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1859&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8301247
  Stats: 679 lines in 6 files changed: 446 ins; 217 del; 16 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1859.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1859/head:pull/1859

PR: https://git.openjdk.org/jdk17u-dev/pull/1859