Added the ability for a game mode to multiply the crafting cost of a set of items
Uses the loot tag system, added a new FirearmAmmunition tag
Can be defined in sliders on the gamemode prefab, can also override per game mode to pipe in convars
Exposed multiplier as a convar for hardcore (server.hardcoreFirearmAmmunitionCraftingMultiplier), defaults to x10 crafting cost (WIP)
Applied to : regular/HV/incendiary pistol ammo, regular/HV/invendiary rifle ammo