Add missing not_in_creative_inventory group where appropriate (#2764)

mods/default/tools.lua

@@ -4,9 +4,8 @@
 local S = default.get_translator
 
 -- The hand
-minetest.register_item(":", {
-	type = "none",
-	wield_image = "wieldhand.png",
+-- Override the hand item registered in the engine in builtin/game/register.lua
+minetest.override_item("", {
 	wield_scale = {x=1,y=1,z=2.5},
 	tool_capabilities = {
 		full_punch_interval = 0.9,