[MIRROR] Updates all the icons in under/suits.dmi and related sorting/cleanup [MDB IGNORE] (#22819)

* Updates all the icons in under/suits.dmi and related sorting/cleanup (#76865)

Somebody was pointing out how our suits varied WILDLY in quality
Figured I'd go through and tidy them up

* Updates all the icons in under/suits.dmi and related sorting/cleanup

* Rename Amish suit, remove scratch suit (was removed upstream)

* Fixes a rogue path

---------

Co-authored-by: OrionTheFox <76465278+OrionTheFox@users.noreply.github.com>
Co-authored-by: Giz <13398309+vinylspiders@users.noreply.github.com>

code/game/objects/effects/spawners/costume.dm

@@ -65,7 +65,7 @@
 	name = "butler costume spawner"
 	items = list(
 		/obj/item/clothing/accessory/waistcoat,
-		/obj/item/clothing/under/suit/black,
+		/obj/item/clothing/under/costume/buttondown/slacks/service,
 		/obj/item/clothing/neck/tie/black,
 		/obj/item/clothing/head/hats/tophat,
 	)
@@ -95,7 +95,7 @@
 		/obj/effect/spawner/random/clothing/bowler_or_that,
 		/obj/item/clothing/shoes/sneakers/black,
 		/obj/item/cane,
-		/obj/item/clothing/under/suit/sl,
+		/obj/item/clothing/under/costume/buttondown/slacks/service,
 		/obj/item/clothing/mask/fakemoustache,
 	)
 
@@ -210,7 +210,7 @@
 	name = "black mafia outfit spawner"
 	items = list(
 		/obj/item/clothing/head/fedora,
-		/obj/item/clothing/under/suit/blacktwopiece,
+		/obj/item/clothing/under/suit/black,
 		/obj/item/clothing/shoes/laceup,
 	)