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/shuttle/spaceship_navigation_beacon.dm

@@ -5,7 +5,7 @@
 	icon_state = "beacon_active"
 	base_icon_state = "beacon"
 	density = TRUE
-	flags_1 = NODECONSTRUCT_1
+	obj_flags = NO_DECONSTRUCTION
 
 	/// Locked beacons cannot be jumped to by ships.
 	var/locked = FALSE

code/modules/shuttle/special.dm

@@ -79,7 +79,7 @@
 	var/obj/machinery/power/emitter/energycannon/magical/our_statue
 	var/list/mob/living/sleepers = list()
 	var/never_spoken = TRUE
-	flags_1 = NODECONSTRUCT_1
+	obj_flags = NO_DECONSTRUCTION
 
 /obj/structure/table/abductor/wabbajack/Initialize(mapload)
 	. = ..()
@@ -201,7 +201,7 @@
 
 /obj/structure/table/wood/shuttle_bar
 	resistance_flags = LAVA_PROOF | FIRE_PROOF | ACID_PROOF
-	flags_1 = NODECONSTRUCT_1
+	obj_flags = NO_DECONSTRUCTION
 	max_integrity = 1000
 	var/boot_dir = 1
 

code/modules/shuttle/syndicate.dm

@@ -11,7 +11,7 @@
 	shuttleId = "syndicate"
 	possible_destinations = "syndicate_away;syndicate_z5;syndicate_ne;syndicate_nw;syndicate_n;syndicate_se;syndicate_sw;syndicate_s;syndicate_custom"
 	resistance_flags = INDESTRUCTIBLE | LAVA_PROOF | FIRE_PROOF | ACID_PROOF
-	flags_1 = NODECONSTRUCT_1
+	obj_flags = NO_DECONSTRUCTION
 
 /obj/machinery/computer/shuttle/syndicate/launch_check(mob/user)
 	. = ..()