Fix #114047: Use correct collection during USD import

Ensure that the view layer is properly synced before trying to get the
active collection.

Without the sync, imported objects typically get placed in the global
Scene Collection rather than the new collection that was just created
for the import.

Pull Request: https://projects.blender.org/blender/blender/pulls/114650

source/blender/io/usd/intern/usd_capi_import.cc

@@ -173,6 +173,7 @@ static void import_startjob(void *customdata, bool *stop, bool *do_update, float
 
     WM_main_add_notifier(NC_SCENE | ND_LAYER, nullptr);
 
+    BKE_view_layer_synced_ensure(data->scene, data->view_layer);
     data->view_layer->active_collection = BKE_layer_collection_first_from_scene_collection(
         data->view_layer, import_collection);
   }