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

data/maps/LilycoveCity/map.json

@@ -518,5 +518,12 @@
       "item": "ITEM_POKE_BALL",
       "flag": "FLAG_HIDDEN_ITEM_LILYCOVE_CITY_POKE_BALL"
     }
+  ],
+  "heal_locations": [
+    {
+      "id": "HEAL_LOCATION_LILYCOVE_CITY",
+      "x": 24,
+      "y": 15
+    }
   ]
 }