Replace Gradle's deprecated configuration.getFiles() with newer API

[Eng-Fouad]

resolvedConfiguration.getFiles() is deprecated since Gradle 8.11 and will be removed in the next release Gradle 9.0.

* @deprecated Use {@link ResolvableDependencies#getFiles()} instead.
     */
    @Deprecated
    Set<File> getFiles() throws ResolveException;

[quarkus-bot]

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