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

data/maps/SootopolisCity/map.json

@@ -409,12 +409,5 @@
       "player_facing_dir": "BG_EVENT_PLAYER_FACING_ANY",
       "script": "SootopolisCity_EventScript_CitySign"
     }
-  ],
-  "heal_locations": [
-    {
-      "id": "HEAL_LOCATION_SOOTOPOLIS_CITY",
-      "x": 43,
-      "y": 32
-    }
   ]
 }