Prevent tests from writing alembic.ini at project root.

src/database/test/unit/migrations/alembic/test_ligare_alembic.py

@@ -76,6 +76,7 @@ def test__LigareAlembic__passes_through_to_alembic_with_default_config_when_not_
     )
 
     ligare_alembic = LigareAlembic(None, MagicMock())
+    ligare_alembic._write_ligare_alembic_config = MagicMock()
     ligare_alembic.run()
 
     assert alembic_main.called