alias hat_leaf -> leaf_hat_ornament

BUR #32243 has been approved by @nonamethanks.

create alias hat_leaf -> leaf_hat_ornament

Same thing. Since we have heart_hair_ornament <-> heart_hat_ornament, and hair_leaf is aliased to leaf_hair_ornament, I went with leaf_hat_ornament.

The bulk update request #32243 (forum #310147) has been approved by @nonamethanks.