Blood pack variety crates now contain Elzu and IPC blood. (#2875)

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## About The Pull Request
Title. Also, "random blood pack" now can roll Elzu and IPC blood.

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## Why It's Good For The Game
You would expect the blood pack variety crate to contain blood for ALL
the species!!! Same with the random blood pack.

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## Changelog

:cl:
tweak: "Blood pack variety crate" now contains Elzu and IPC blood.
tweak: Random blood packs now can roll Elzu and IPC blood.
/:cl:

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code/modules/cargo/packs/medical.dm

@@ -92,7 +92,9 @@
 					/obj/item/reagent_containers/blood/BMinus,
 					/obj/item/reagent_containers/blood/OPlus,
 					/obj/item/reagent_containers/blood/OMinus,
-					/obj/item/reagent_containers/blood/lizard)
+					/obj/item/reagent_containers/blood/lizard,
+					/obj/item/reagent_containers/blood/elzuose,
+					/obj/item/reagent_containers/blood/synthetic)
 	crate_name = "blood freezer"
 	crate_type = /obj/structure/closet/crate/freezer
 

code/modules/reagents/reagent_containers/blood_pack.dm

@@ -38,7 +38,7 @@
 
 /obj/item/reagent_containers/blood/random/Initialize()
 	icon_state = "bloodpack"
-	blood_type = pick("A+", "A-", "B+", "B-", "O+", "O-", "L")
+	blood_type = pick("A+", "A-", "B+", "B-", "O+", "O-", "L", "E", "Coolant")
 	return ..()
 
 /obj/item/reagent_containers/blood/APlus