Fix broken import of aiida.manage.configuration.Config

A recent release of `aiida-core` removed the import of `Config` directly
from the module `aiida.manage.configuration` causing the tests to fail.
It should now be imported from `aiida.manage.configuration.config.Config`.

tests/cli/test_install.py

@@ -4,7 +4,7 @@
 import pathlib
 
 import pytest
-from aiida.manage.configuration import Config
+from aiida.manage.configuration.config import Config
 from aiida.orm import QueryBuilder
 from aiida_pseudo.cli import cmd_install_family, cmd_install_pseudo_dojo, cmd_install_sssp, install
 from aiida_pseudo.data.pseudo.upf import UpfData