Use the minecraft-dependencies BOM for deps

[Matyrobbrt]

This PR switches us from using a version of GSON and SLF4J defined in the gradle.properties for the coremods and Gradle plugin projects to using the minecraft-dependencies platform to keep the versions in sync.

The PR also removes the explicit commons-lang3 dependency as the server and client version difference is no longer present in 1.21.4

[neoforged-pr-publishing]

• Publish PR to GitHub Packages

Last commit published: 01136d0bac627a522d163d5f1d0ca6d20c7bb71f.

PR Publishing

The artifacts published by this PR:

• 📦 net.neoforged:neoforge:21.4.72-beta-pr-1872-use-bom-for-deps
• 📦 net.neoforged:testframework:21.4.72-beta-pr-1872-use-bom-for-deps

Repository Declaration

In order to use the artifacts published by the PR, add the following repository to your buildscript:

repositories {
    maven {
        name 'Maven for PR #1872' // https://github.com/neoforged/NeoForge/pull/1872
        url 'https://prmaven.neoforged.net/NeoForge/pr1872'
        content {
            includeModule('net.neoforged', 'neoforge')
            includeModule('net.neoforged', 'testframework')
        }
    }
}

MDK installation

In order to setup a MDK using the latest PR version, run the following commands in a terminal.
The script works on both *nix and Windows as long as you have the JDK bin folder on the path.
The script will clone the MDK in a folder named NeoForge-pr1872.
On Powershell you will need to remove the -L flag from the curl invocation.

mkdir NeoForge-pr1872
cd NeoForge-pr1872
curl -L https://prmaven.neoforged.net/NeoForge/pr1872/net/neoforged/neoforge/21.4.72-beta-pr-1872-use-bom-for-deps/mdk-pr1872.zip -o mdk.zip
jar xf mdk.zip
rm mdk.zip || del mdk.zip

To test a production environment, you can download the installer from here.

[neoforged-automation]

@Matyrobbrt, this pull request has conflicts, please resolve them for this PR to move forward.