logfile for alert-rules missing

In

Line 60 in 728125d

    
           def save_alert_rules(folder_path, log_file, grafana_url, http_get_headers, verify_ssl, client_cert, debug, pretty_print):

a log_file variable is passed, but it is not used at all. So there's no alert_rules_.txt like for the other grafana objects.

And maybe save_datasources.py (and possibly other save functions) should also have a log functionality.