Off-station (ruins) shield wall gens start unlocked (#61312)

Adds a variant of shield wall generators (the kind in xenobio and the teleporter) without access restrictions, for use in ruins.

Consistency with most things in space not having access requirements. Given its use is limited to the RD, captain, or silicons, having a bunch of them in space and unusable is not really sensible. Unlocks the few in away missions as well (and in one case turns a varedited one into just the unlocked one)

_maps/RandomRuins/SpaceRuins/abandonedzoo.dmm

@@ -3,7 +3,7 @@
 /turf/template_noop,
 /area/template_noop)
 "ab" = (
-/obj/machinery/power/shieldwallgen/anchored,
+/obj/machinery/power/shieldwallgen/unlocked/anchored,
 /obj/structure/cable,
 /turf/open/floor/plating/airless,
 /area/ruin/space/has_grav/abandonedzoo)
@@ -99,7 +99,7 @@
 /turf/open/floor/iron/dark,
 /area/ruin/space/has_grav/abandonedzoo)
 "aE" = (
-/obj/machinery/power/shieldwallgen/anchored,
+/obj/machinery/power/shieldwallgen/unlocked/anchored,
 /obj/structure/cable,
 /turf/open/floor/plating,
 /area/ruin/space/has_grav/abandonedzoo)
@@ -298,12 +298,12 @@
 /area/ruin/space/has_grav/abandonedzoo)
 "bs" = (
 /obj/structure/cable,
-/obj/machinery/power/shieldwallgen/anchored,
+/obj/machinery/power/shieldwallgen/unlocked/anchored,
 /turf/open/floor/plating,
 /area/ruin/space/has_grav/abandonedzoo)
 "bt" = (
 /obj/structure/cable,
-/obj/machinery/power/shieldwallgen/anchored,
+/obj/machinery/power/shieldwallgen/unlocked/anchored,
 /turf/open/floor/plating/airless,
 /area/ruin/space/has_grav/abandonedzoo)
 "bu" = (
@@ -429,7 +429,7 @@
 /turf/open/floor/plating/airless,
 /area/ruin/space/has_grav/abandonedzoo)
 "bV" = (
-/obj/machinery/power/shieldwallgen,
+/obj/machinery/power/shieldwallgen/unlocked,
 /turf/template_noop,
 /area/template_noop)
 "bW" = (

_maps/RandomRuins/SpaceRuins/crashedship.dmm

@@ -914,7 +914,7 @@
 /turf/open/floor/carpet,
 /area/awaymission/bmpship/fore)
 "dL" = (
-/obj/machinery/power/shieldwallgen,
+/obj/machinery/power/shieldwallgen/unlocked,
 /obj/structure/cable,
 /turf/open/floor/plating,
 /area/awaymission/bmpship/midship)

_maps/RandomZLevels/Academy.dmm

@@ -1291,7 +1291,7 @@
 /turf/open/floor/carpet,
 /area/awaymission/academy/academyaft)
 "fH" = (
-/obj/machinery/power/shieldwallgen,
+/obj/machinery/power/shieldwallgen/unlocked,
 /obj/effect/turf_decal/stripes/line{
 	dir = 8
 	},

_maps/RandomZLevels/moonoutpost19.dmm

@@ -3173,10 +3173,7 @@
 	},
 /area/awaymission/moonoutpost19/research)
 "gZ" = (
-/obj/machinery/power/shieldwallgen{
-	locked = 0;
-	req_access = null
-	},
+/obj/machinery/power/shieldwallgen/unlocked,
 /obj/structure/cable,
 /turf/open/floor/plating{
 	heat_capacity = 1e+006

code/game/machinery/shieldgen.dm

@@ -276,6 +276,13 @@
 /obj/machinery/power/shieldwallgen/anchored
 	anchored = TRUE
 
+/obj/machinery/power/shieldwallgen/unlocked //for use in ruins, etc
+	locked = FALSE
+	req_access = null
+
+/obj/machinery/power/shieldwallgen/unlocked/anchored
+	anchored = TRUE
+
 /obj/machinery/power/shieldwallgen/Initialize()
 	. = ..()
 	if(anchored)