[11117] Allow for non-instancable maps have InstanceData and instance scripts.

* New table added for non-instanced maps (except BG/arena):
    - `mangos`.`world_template` (script mapping to non instanced data)
    - `characters`.`world` (saved script data string storage)

* InstancedData created for any map types including BGs/arenas, that allow have scripts
  state for any maps, but BG/arena instance data not saved.

Note: Possible structures will renamed later for clarify apply to any type maps,
but avoid for now for simplify changes and hard affect to script library sources.

src/game/MapManager.cpp

@@ -115,6 +115,9 @@ Map* MapManager::CreateMap(uint32 id, const WorldObject* obj)
             m = new Map(id, i_gridCleanUpDelay, 0, REGULAR_DIFFICULTY);
             //add map into container
             i_maps[MapID(id)] = m;
+
+            // non-instanceable maps always expected have saved state
+            m->CreateInstanceData(true);
         }
     }
 
@@ -419,6 +422,7 @@ InstanceMap* MapManager::CreateInstanceMap(uint32 id, uint32 InstanceId, Difficu
     InstanceMap *map = new InstanceMap(id, i_gridCleanUpDelay, InstanceId, difficulty);
     MANGOS_ASSERT(map->IsDungeon());
 
+    // Dungeons can have saved instance data
     bool load_data = save != NULL;
     map->CreateInstanceData(load_data);
 
@@ -441,6 +445,9 @@ BattleGroundMap* MapManager::CreateBattleGroundMap(uint32 id, uint32 InstanceId,
     //add map into map container
     i_maps[MapID(id, InstanceId)] = map;
 
+    // BGs/Arenas not have saved instance data
+    map->CreateInstanceData(false);
+
     return map;
 }