Rework how the Java and Gradle version trampolines work since Kotlin build-scripts have trouble with multi-release jars

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Last commit published: 6c797f852f82b11d4c1d319bd362a39190608b7c.

PR Publishing

### The artifacts published by this PR: - :package: [`net.neoforged.moddev.junit:net.neoforged.moddev.junit.gradle.plugin:0.1.20-pr-4-rework-trampolines`](https://github.com/neoforged/ModDevGradle/packages/2160049) - :package: [`net.neoforged:moddev-gradle:0.1.20-pr-4-rework-trampolines`](https://github.com/neoforged/ModDevGradle/packages/2160048) - :package: [`net.neoforged.moddev:net.neoforged.moddev.gradle.plugin:0.1.20-pr-4-rework-trampolines`](https://github.com/neoforged/ModDevGradle/packages/2160050) ### Repository Declaration In order to use the artifacts published by the PR, add the following repository to your buildscript: ```gradle repositories { maven { name 'Maven for PR #4' // https://github.com/neoforged/ModDevGradle/pull/4 url 'https://prmaven.neoforged.net/ModDevGradle/pr4' content { includeModule('net.neoforged.moddev.junit', 'net.neoforged.moddev.junit.gradle.plugin') includeModule('net.neoforged', 'moddev-gradle') includeModule('net.neoforged.moddev', 'net.neoforged.moddev.gradle.plugin') } } } ```