Attribute modifier "display" field is ignored by attribute modifiers in custom enchantments

The new “display“ field for attribute modifiers is missing for attribute modifiers defined by custom enchantment JSON files, meaning you can’t hide or override the modifier in the tooltip.

Steps To Reproduce:

1. Download the attached data pack and enable it in a world (requires server restart to add new enchantment).

2. Give yourself a pickaxe and enchant it with /enchant @s namespace:example. Or run this command:

   /give @s minecraft:diamond_pickaxe[enchantments={"namespace:example":1}]

3. See that the attribute modifier appears in the tooltip despite the enchantment definition specifying "display":{"type":"hidden"}.

4. Give yourself an item with a similar attribute modifier in the attribute_modifiers component instead and see that the modifier is hidden.

   /give @s minecraft:wooden_pickaxe[minecraft:attribute_modifiers=[{type:"minecraft:block_break_speed",id:"namespace:example_penalty",amount:-1,operation:"add_multiplied_total",display:{type:"hidden"}}]]

Expected Behaviour:

The display field is respected by enchantment-defined attribute modifiers