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/cannons/cannon.dm

@@ -117,6 +117,7 @@
 	icon_state = "garbagegun"
 	anchored = FALSE
 	anchorable_cannon = FALSE
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 11.15, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 1.5)
 	var/fires_before_deconstruction = 5
 
 /obj/structure/cannon/trash/fire()

code/game/objects/structures/cannons/cannonballs.dm

@@ -71,6 +71,7 @@
 	base_icon_state = "trashballs"
 	merge_type = /obj/item/stack/cannonball/trashball
 	projectile_type = /obj/projectile/bullet/cannonball/trashball
+	custom_materials = list(/datum/material/alloy/plasteel = SHEET_MATERIAL_AMOUNT)
 
 /obj/item/stack/cannonball/trashball/four
 	amount = 4

code/game/objects/structures/cannons/mounted_guns/mounted_gun.dm

@@ -114,6 +114,7 @@
 	fire_delay = 3 DECISECONDS
 	shot_delay = 2 DECISECONDS
 	firing_shakes_camera = FALSE
+	custom_materials = list(/datum/material/iron = SHEET_MATERIAL_AMOUNT * 24.5, /datum/material/wood = SHEET_MATERIAL_AMOUNT * 15, /datum/material/glass = SMALL_MATERIAL_AMOUNT)
 
 /obj/structure/mounted_gun/pipe/examine_more(mob/user)
 	. = ..()