RFR: 8362598: [macos] Add tests for custom info plist files [v6]

[Alexander Matveev]

On Thu, 9 Oct 2025 01:54:42 GMT, Alexander Matveev <almatvee at openjdk.org> wrote:

>> - Added test for custom info plist to cover app image including embedded runtime and runtime installer.
>> - Fixed bug in `writePList`. It was missing `writeStartDocument()/writeEndDocument()` and `DOCTYPE` should be full xml string.
>
> Alexander Matveev has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8362598: [macos] Add tests for custom info plist files [v6]

8362598: [macos] Add tests for custom info plist files [v7]
- Move PListWriter to the shared code.

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PR Comment: https://git.openjdk.org/jdk/pull/27509#issuecomment-3387583326