[TODO] check how to make this fail fast during unit testing, otherwise

[nfx]

See more context:

blueprint/src/databricks/labs/blueprint/installation.py

Lines 383 to 388 in 3358084

	with self._lock:
	# TODO: check how to make this fail fast during unit testing, otherwise
	# this currently hangs with the real installation class and mocked workspace client
	with self._ws.workspace.download(f"{self.install_folder()}/{filename}") as f:
	return self._convert_content(filename, f)