fix: do not use interpolation for INI files in cloud_storage.py (#1081)

Closes #1079.

Author: leafty

components/renku_data_services/notebooks/api/schemas/cloud_storage.py

@@ -264,7 +264,7 @@ def config_string(self, name: str) -> str:
             # Switch is a fake provider we add for users, we need to replace it since rclone itself
             # doesn't know it
             self.configuration["provider"] = "Other"
-        parser = ConfigParser()
+        parser = ConfigParser(interpolation=None)
         parser.add_section(name)
 
         def _stringify(value: Any) -> str: