Reorganize file utils (#16264)

* Split file_utils in several submodules

* Fixes

* Add back more objects

* More fixes

* Who exactly decided to import that from there?

* Second suggestion to code with code review

* Revert wront move

* Fix imports

* Adapt all imports

* Adapt all imports everywhere

* Revert this import, will fix in a separate commit

src/transformers/dynamic_module_utils.py

@@ -24,8 +24,14 @@ from typing import Dict, Optional, Union
 
 from huggingface_hub import HfFolder, model_info
 
-from .file_utils import HF_MODULES_CACHE, TRANSFORMERS_DYNAMIC_MODULE_NAME, cached_path, hf_bucket_url, is_offline_mode
-from .utils import logging
+from .utils import (
+    HF_MODULES_CACHE,
+    TRANSFORMERS_DYNAMIC_MODULE_NAME,
+    cached_path,
+    hf_bucket_url,
+    is_offline_mode,
+    logging,
+)
 
 
 logger = logging.get_logger(__name__)  # pylint: disable=invalid-name