Demotes the "electrical conductivity" flag from flags_1 to obj_flags (#80033)

## About The Pull Request

Code to handle this flag only ever existed on the `/obj` sublevel, so
there's no need for it to be on the `/atom` level `flags_1`. There was
probably a point in time in which mobs or turfs conducted electricity
but there's zero code for it anymore so we truly just live in a society
now.
## Why It's Good For The Game

Frees up a slot on `flags_1` (which is really nice actually), proper
scoping of certain bitflag stuff, etc.
## Changelog
Not relevant to players.

I may have screwed something up, will be doing a few passes on this
myself to ensure all the search and replaces went alright but we should
be good™️

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

@@ -5,7 +5,7 @@
 	icon_state = "pointer"
 	inhand_icon_state = "pen"
 	worn_icon_state = "pen"
-	flags_1 = CONDUCT_1
+	obj_flags = CONDUCTS_ELECTRICITY
 	item_flags = NOBLUDGEON
 	slot_flags = ITEM_SLOT_BELT
 	custom_materials = list(/datum/material/iron = SMALL_MATERIAL_AMOUNT * 5, /datum/material/glass = SMALL_MATERIAL_AMOUNT * 5)