Enchantment Damage Effects do not apply to Armor

When creating custom enchantments, the minecraft:damage effect type does not apply at all if the item that is enchanted is being worn as a piece of Armor

Steps to Reproduce:

1. Create a Custom Enchantment that can be applied to armor and has a modifier for the minecraft:damage effect
2. Apply the enchantment to armor, wear it, and then attack a mob.
3. See that it doesn't change the damage dealt at all

Expected: The damage should change accordingly to what the enchantment changes, like how it does on an item that is held