replace magic numbers related to emp and explosion severity with defines (#26495)

replace even more magic emp and ex numbers

code/game/objects/items/devices/flashlight.dm

@@ -393,7 +393,7 @@
 			var/mob/M = A
 			add_attack_logs(user, M, "Hit with EMP-light")
 		to_chat(user, "[src] now has [emp_cur_charges] charge\s.")
-		A.emp_act(1)
+		A.emp_act(EMP_HEAVY)
 	else
 		to_chat(user, "<span class='warning'>\The [src] needs time to recharge!</span>")
 	return

code/game/objects/items/devices/laserpointer.dm

@@ -129,7 +129,7 @@
 	else if(istype(target, /obj/machinery/camera))
 		var/obj/machinery/camera/C = target
 		if(prob(effectchance * diode.rating))
-			C.emp_act(1)
+			C.emp_act(EMP_HEAVY)
 			outmsg = "<span class='notice'>You hit the lens of [C] with [src], temporarily disabling the camera!</span>"
 
 			log_admin("[key_name(user)] EMPd a camera with a laser pointer")