add slightly more challenge in obtaining The Happy Ghast mount

Being able to fly even in a slow and cumbersome manner before even going to The End seems really OP. There should be more of a challenge in obtaining The Happy ghast than by just finding it in The Nether and feeding it snowballs. Maybe have it be in some kind of "ghast nest" that you have to fight some sort of "mama ghast" miniboss mob to obtain it? Another idea would be make the ghast harness uncraftable and appear as fortress chest loot or through Piglin bartering. The regular saddle is already like this why not the saddle for the ghast? Or a "crafting schematic" for the harness could be found in loot chests and duplicated like armor trims and combined with a regular saddle in a smithing table to create the harness. The crafting recipe removes almost all challenge and reason to go to a soul sand valley now so maybe have the ghasts have a rare "heart of ghast" drop or something that could also be obtained via Piglin bartering or chest loot that would be used in crafting it. I love this new feature but like a lot of things it feels half baked and needs more tweaking and I hope it can be fully balanced and realized to its full potential in the next update.