Move heal locations data to their associated map.json (#2034)

data/maps/LavaridgeTown/map.json

@@ -258,5 +258,12 @@
       "item": "ITEM_ICE_HEAL",
       "flag": "FLAG_HIDDEN_ITEM_LAVARIDGE_TOWN_ICE_HEAL"
     }
+  ],
+  "heal_locations": [
+    {
+      "id": "HEAL_LOCATION_LAVARIDGE_TOWN",
+      "x": 9,
+      "y": 7
+    }
   ]
 }