Storage upload: more reasonable timeout

Author: Antti Myyrä

upcloud_api/cloud_manager/storage_mixin.py

@@ -198,7 +198,7 @@ def upload_file_for_storage_import(
         self,
         storage_import: StorageImport,
         file: 'PathLike[str]',
-        timeout: int = 600,
+        timeout: int = 30,
         content_type: str = 'application/octet-stream',
     ):
         """