Turn hydroponics get and set_trait into defines (#21404)

Hydroponics tray processing is a massive chunk of machinery processing
for no good reason, I have a sneaking suspicion that this is due to proc
overhead on get_trait, as process can call it upwards of 30 times per
tick per tray.

Realistically most of the things that are traits should instead be
variables, but that's a refactor for someone with more time.

code/game/objects/effects/chem/chemsmoke.dm

@@ -232,7 +232,7 @@
 
 /datum/effect/effect/system/smoke_spread/chem/spores/start()
 	..()
-	if(seed && seed.get_trait(TRAIT_SPREAD))
+	if(seed && GET_SEED_TRAIT(seed, TRAIT_SPREAD))
 		var/sporecount = 0
 		for(var/turf/T in targetTurfs)
 			var/bad_turf = 0
@@ -242,10 +242,10 @@
 					break
 			if(bad_turf)
 				continue
-			if(prob(min(seed.get_trait(TRAIT_POTENCY), 50)))
+			if(prob(min(GET_SEED_TRAIT(seed, TRAIT_POTENCY), 50)))
 				new /obj/machinery/portable_atmospherics/hydroponics/soil/invisible(T,seed)
 				sporecount++
-			if(sporecount < max(1, round(seed.get_trait(TRAIT_POTENCY) / 20), 1))
+			if(sporecount < max(1, round(GET_SEED_TRAIT(seed, TRAIT_POTENCY) / 20), 1))
 				break