[Fix] Add num_features in Lyft dataset info file (#1948)

Co-authored-by: Tai-Wang <tab_wang@outlook.com>

tools/dataset_converters/lyft_converter.py

@@ -131,6 +131,7 @@ def _fill_trainval_infos(lyft,
 
         info = {
             'lidar_path': lidar_path,
+            'num_features': 5,
             'token': sample['token'],
             'sweeps': [],
             'cams': dict(),

tools/dataset_converters/update_infos_to_v2.py

@@ -761,6 +761,8 @@ def update_lyft_infos(pkl_path, out_dir):
         temp_data_info['ego2global'] = convert_quaternion_to_matrix(
             ori_info_dict['ego2global_rotation'],
             ori_info_dict['ego2global_translation'])
+        temp_data_info['lidar_points']['num_pts_feats'] = ori_info_dict.get(
+            'num_features', 5)
         temp_data_info['lidar_points']['lidar_path'] = Path(
             ori_info_dict['lidar_path']).name
         temp_data_info['lidar_points'][