RFR: 8344415: Restruct jpackage utility classes

[Alexey Semenyuk]

On Mon, 18 Nov 2024 18:31:09 GMT, Alexey Semenyuk <asemenyuk at openjdk.org> wrote:

> Move child classes of "jdk.jpackage.test.Functional" class to "jdk.jpackage.internal.util.function" package.
> Split "jdk.jpackage.internal.IOUtils" class in "PathUtils", "FileUtils", "XmlUtils" classes in "jdk.jpackage.internal.util" package.
> 
> Implmenetation didnt change except of `FileUtils.deleteRecursive()` that was cleared from the dependency on "AtomicReference".
> 
> Applied `bin/blessed-modifier-order.sh` script to the modified files.

@sashamatveev ptal

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PR Comment: https://git.openjdk.org/jdk/pull/22216#issuecomment-2483820364