refactor(config): require explicit BZOD data directory

tests/legacy_restore_tests.rs

@@ -21,8 +21,7 @@ use std::path::PathBuf;
 use tar::Builder;
 
 fn create_temp_config(temp_dir: PathBuf) -> Config {
-    let mut config = Config::load();
-    config.data_dir = temp_dir.clone();
+    let mut config = Config::load_with_cli(Some(&temp_dir)).unwrap();
     config.backup_dir = temp_dir.clone();
     config.base_url = Some("http://bzo.in".to_string());
     config