RFR: 8336332: Rework tests to avoid unrelated stderr output [v4]

[Andy Goryachev]

On Tue, 16 Sep 2025 18:09:30 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

> 1. Since you are only addressing the `javafx.base`

so that's where it gets complicated: turns out the utility gets used in more tests (graphics, fxml, see https://github.com/openjdk/jfx/pull/1905 ), so two things came up:

1. the utility needs to be moved to another package
2. the utility probably needs to be decoupled from Logging, as it creates unneeded dependency with `--add-exports javafx.base/com.sun.javafx.binding=ALL-UNNAMED` in #1905 
3. perhaps the two PRs need to be merged into one larger one

What do you think?

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PR Comment: https://git.openjdk.org/jfx/pull/1897#issuecomment-3300030743