Emi version: 1.1.4+1.20.4

Currently custom recipes that use synthetic ids (such as shulker box coloring recipes), don't return the actual backing recipe from EmiRecipe#getBackingRecipe. It would be helpful to have them store a reference to the actual RecipeHolder and then return that, rather than using the default implementation of looking the holder up from the recipe manager, as it fails because of them using synthetic ids.