RFR: 8356219: jpackage places libapplauncher.so in incorrect location in the app image [v2]

[Alexey Semenyuk]

> - Refactor PathGroup
>  - Add test cases to PathGroupTest
>  - Update UsrTreeTest to verify "libapplauncher.so" is placed in the correct location in the package
>  - Refactor UsrTreeTest to use JPackageCommand assert functions

Alexey Semenyuk has updated the pull request incrementally with two additional commits since the last revision:

 - Update copyright year
 - Fix a typo in ApplicationLayout

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Changes:
  - all: https://git.openjdk.org/jdk/pull/25051/files
  - new: https://git.openjdk.org/jdk/pull/25051/files/fa35bfbc..2ef2f889

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25051&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25051&range=00-01

  Stats: 9 lines in 3 files changed: 0 ins; 0 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/25051.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25051/head:pull/25051

PR: https://git.openjdk.org/jdk/pull/25051