Fix: Missing a MetadataConfigs init when the repo has a datasets_info.json but no README (#6164)

MetadataConfigs not initialized when the repo has a `datasets_info.json` but no README

Author: clefourrier

src/datasets/arrow_dataset.py

@@ -5462,6 +5462,7 @@ def push_to_hub(
             dataset_card = None
             dataset_card_data = DatasetCardData()
             download_config = DownloadConfig()
+            metadata_configs = MetadataConfigs()
             download_config.download_desc = "Downloading metadata"
             download_config.token = token
             dataset_infos_path = cached_path(