Scopes NODECONSTRUCT_1 from flags_1 to obj_flags (#80104)

This flag only worked on the `/obj/structure` and `/obj/machinery`
level, so let's rescope it from `flags_1` and put it where it belongs -
`obj_flags`.
Bitflag operators should be scoped to their subtype specific bitfield,
not really useful to have this take up a spot on the `/atom` level if
absolutely nothing other than `/obj`s use it.

code/modules/holodeck/computer.dm

@@ -294,12 +294,12 @@ GLOBAL_LIST_INIT(typecache_holodeck_linked_floorcheck_ok, typecacheof(list(/turf
 		holo_object.resistance_flags = LAVA_PROOF | FIRE_PROOF | UNACIDABLE | ACID_PROOF
 
 		if(isstructure(holo_object))
-			holo_object.flags_1 |= NODECONSTRUCT_1
+			holo_object.obj_flags |= NO_DECONSTRUCTION
 			return
 
 		if(ismachinery(holo_object))
 			var/obj/machinery/holo_machine = holo_object
-			holo_machine.flags_1 |= NODECONSTRUCT_1
+			holo_machine.obj_flags |= NO_DECONSTRUCTION
 			holo_machine.power_change()
 
 			if(istype(holo_machine, /obj/machinery/button))

code/modules/holodeck/holo_effect.dm

@@ -49,7 +49,8 @@
 	var/static/banned_books = list(/obj/item/book/manual/random, /obj/item/book/manual/nuclear, /obj/item/book/manual/wiki)
 	var/newtype = pick(subtypesof(/obj/item/book/manual) - banned_books)
 	var/obj/item/book/manual/to_spawn = new newtype(loc)
-	to_spawn.flags_1 |= (HOLOGRAM_1 | NODECONSTRUCT_1)
+	to_spawn.flags_1 |= HOLOGRAM_1
+	to_spawn.obj_flags |= NO_DECONSTRUCTION
 	return to_spawn
 
 /obj/effect/holodeck_effect/mobspawner

code/modules/holodeck/items.dm

@@ -135,7 +135,7 @@
 	eventstarted = TRUE
 
 	for(var/obj/structure/window/W in currentarea)
-		if(W.flags_1&NODECONSTRUCT_1) // Just in case: only holo-windows
+		if(W.obj_flags & NO_DECONSTRUCTION) // Just in case: only holo-windows
 			qdel(W)
 
 	for(var/mob/M in currentarea)