Datapack to change overworld ore generation

[TheSecondLord]

• Created datapack overrides for the iron and diamond ore configured features to replace iron ore with stone, diamond ore with stone and deepslate diamond ore with deepslate
  • This would cause issues if another dimension used the same features for ore generation, but they shouldn't unless they're copying the overworld
• Added openloader as a mod dependancy to always load the datapack

[slbsh]

Thanks for contributing! merging