Generate heal location constants automatically, move data back to a single file.

data/maps/CeruleanCity/map.json

@@ -420,14 +420,5 @@
       "player_facing_dir": "BG_EVENT_PLAYER_FACING_ANY",
       "script": "CeruleanCity_BikeShop_EventScript_Bicycle"
     }
-  ],
-  "heal_locations": [
-    {
-      "id": "HEAL_LOCATION_CERULEAN_CITY",
-      "x": 22,
-      "y": 20,
-      "respawn_map": "MAP_CERULEAN_CITY_POKEMON_CENTER_1F",
-      "respawn_npc": "LOCALID_CERULEAN_NURSE"
-    }
   ]
 }