Unit test material checks are now performed on all crafting recipes by default. All stack recipes now transfer mats to the results (#92620)

## About The Pull Request
Extends the part of the crafting unit test that ensures consistency
between the total mats of the components of a recipe (or rather, the
result of said recipe) and a generic instance of the same type as its
result, previously only implemented on food recipes.

## Why It's Good For The Game
This ensures a degree of consistency with the material composition of
various objects in the game. I couldn't do it in the original PR as that
one was too big already and it took months to get it merged, and have
the relative bugs fixed.

Currently a WIP as I slowly deal with the unit test reports.

## Changelog

🆑
refactor: Follow-up to the crafting/material refactor from months ago.
All objects crafted with stacks now inherit their mat composition (not
necessarily the effects and color) by default, while previously only a
few things like chair, sinks and toilets did. Report any object looking
or behaving weirdly as a result.
fix: The material composition of ammo boxes is no longer a 1/10 of what
it's supposed to be. It was a shitty hack to make it harder to recycle
empty ammo boxes. Instead, they lose materials as they're emptied now.
/🆑

code/game/objects/structures/safe.dm

@@ -21,11 +21,13 @@ FLOOR SAFES
 	obj_flags = CONDUCTS_ELECTRICITY
 	interaction_flags_atom = INTERACT_ATOM_ATTACK_HAND | INTERACT_ATOM_UI_INTERACT
 	custom_materials = list(
-		/datum/material/metalhydrogen = SHEET_MATERIAL_AMOUNT*10,
-		/datum/material/alloy/plastitanium = SHEET_MATERIAL_AMOUNT*5,
+		/datum/material/metalhydrogen = SHEET_MATERIAL_AMOUNT * 15,
+		/datum/material/alloy/plastitanium = SHEET_MATERIAL_AMOUNT * 8,
+		/datum/material/alloy/plasteel = SHEET_MATERIAL_AMOUNT * 6,
+		/datum/material/titanium = SHEET_MATERIAL_AMOUNT * 3,
+		/datum/material/iron = SHEET_MATERIAL_AMOUNT * 3,
 	)
 	material_flags = MATERIAL_EFFECTS
-
 	/// The maximum combined w_class of stuff in the safe
 	var/maxspace = 24
 	/// The amount of tumblers that will be generated
@@ -302,6 +304,11 @@ FLOOR SAFES
 	icon_state = "floorsafe"
 	density = FALSE
 	layer = LOW_OBJ_LAYER
+	custom_materials = list(
+		/datum/material/metalhydrogen = SHEET_MATERIAL_AMOUNT * 15,
+		/datum/material/alloy/plastitanium = SHEET_MATERIAL_AMOUNT * 8,
+		/datum/material/iron = SHEET_MATERIAL_AMOUNT * 1.55,
+	)
 
 /obj/structure/safe/floor/Initialize(mapload)
 	. = ..()