Add netherite upgrade option to iron and gold tools/armor as well!

Since netherite is an upgrade to diamond, not an entirely new armor type forged from pure netherite which explains why only one bar is enough for every tool and armor it would make sense to make it available to all metallic armor and tool types such as gold and iron or for the fun of it chain. It's more like a coating or an addition to an armor/tool than a new set. For example it'd be extremely handy to strengthen gold armor a bit with netherite upgrade so it'd still be gold, piglins wouldn't attack you but it'd be still weaker compared to diamond or netherite reinforced diamond armor. Netherite would strengthen an armor/tool that is metallic with about 30-40% or a value that is reasonable.