RFR: Gradle cleanup

[Clayton Walker]

On Mon, 16 Jun 2025 22:15:12 GMT, Clayton Walker <duke at openjdk.org> wrote:

> I've been doing some development, and came across a few warnings during build.
> 
> These are, [Project::task](https://docs.gradle.org/current/javadoc/org/gradle/api/Project.html#task(java.lang.String)) is now deprecated, avoiding Project::mkdir, project::delete and Project::getProjectDir as they cannot work under configuration-cache.

As a follow-up I'd like to see all of the explicit `dependsOn` get removed in favor of implicit dependencies based on manually specified task inputs and outputs. https://docs.gradle.org/9.0.0-rc-1/userguide/best_practices_tasks.html#avoid_depends_on

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PR Comment: https://git.openjdk.org/jextract/pull/283#issuecomment-3029455960