[jdk21u-dev] RFR: 8329862: libjli GetApplicationHome cleanups and enhance jli tracing

[Matthias Baesken]

8329862: libjli GetApplicationHome cleanups and enhance jli tracing

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Commit messages:
 - Backport 377f2e538ae0fc94fc5483700a3ae70175017741

Changes: https://git.openjdk.org/jdk21u-dev/pull/570/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=570&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8329862
  Stats: 46 lines in 2 files changed: 8 ins; 36 del; 2 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/570.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/570/head:pull/570

PR: https://git.openjdk.org/jdk21u-dev/pull/570