Fixes sprite-related CI issues (#15388)

* Fixes the icon_states for the short_pants.dmi file

* Fixes security vendors selling the wrong kind of security jacket at a premium, which resulted in a runtime

* Fixes the two modified screenshot test results

modular_skyrat/modules/sec_haul/code/misc/vending.dm

@@ -78,7 +78,7 @@
 					/obj/item/clothing/gloves/color/black/security = 10,
 					)
 	premium = list( /obj/item/clothing/under/rank/security/officer/formal = 3,
-					/obj/item/clothing/suit/jacket/officer = 3,
+					/obj/item/clothing/suit/jacket/officer/blue = 3,
 					/obj/item/clothing/head/beret/sec/navyofficer = 3)
 	refill_canister = /obj/item/vending_refill/wardrobe/peacekeeper_wardrobe
 	payment_department = ACCOUNT_SEC
@@ -110,5 +110,5 @@
 					/obj/item/clothing/suit/toggle/jacket/sec/old = 3,
 					)
 	premium = list( /obj/item/clothing/under/rank/security/officer/formal = 5,
-					/obj/item/clothing/suit/jacket/officer = 5,
+					/obj/item/clothing/suit/jacket/officer/tan = 5,
 					/obj/item/clothing/head/beret/sec/navyofficer = 5)