Avoid implicit ItemFactory reliance for blocks with special items

this hasn't yet been addressed for signs, since they are a bit of a pain in the ass.

src/block/Carrot.php

@@ -35,7 +35,7 @@ class Carrot extends Crops{
 		];
 	}
 
-	public function getPickedItem(bool $addUserData = false) : Item{
+	public function asItem() : Item{
 		return VanillaItems::CARROT();
 	}
 }