RFR: 8344587: Reduce number of "jdk.jpackage.internal" classes used from other packages [v2]

[Alexey Semenyuk]

> Stop using internal AppImageFile, ApplicationLayout, and PackageFile classes in the tests. Replace them with stubs.
> 
> Stop referencing IOUtils class from XmlUtils and PathUtils classes.

Alexey Semenyuk has updated the pull request incrementally with one additional commit since the last revision:

  Update test/jdk/tools/jpackage/helpers/jdk/jpackage/test/JPackageCommand.java
  
  Co-authored-by: Andrey Turbanov <turbanoff at gmail.com>

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Changes:
  - all: https://git.openjdk.org/jdk/pull/22261/files
  - new: https://git.openjdk.org/jdk/pull/22261/files/9d1f097d..e943bc93

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22261&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22261&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/22261.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22261/head:pull/22261

PR: https://git.openjdk.org/jdk/pull/22261