New Curve Override: ChunkFoodAmountMultiplier

At the moment, the FoodConsumptionRate curve is more or less useless, because it has no effect on the speed that a dino can eat by grabbing chunks of food. Servers trying to slow down eating for realism or gameplay purposes have no way to prevent players from using this workaround. This could be solved by an additional curve that modifies the amount of food held in each chunk of food a player grabs. Due to the ability to grab entire critters or entire forageable items, it might be difficult to make this curve apply to those things. Thats okay! Even if the curve only applied to chunks taken off of player bodies, it would still fulfill the majority of purposes that server owners would want it for.