Update prombench workflows to incorporate new naming convention
Update prombench workflows to incorporate new naming convention

Signed-off-by: Drumil Patel <e5a35571428aad8d41a242e1f9d302c92762f973@gmail.com>

prometheus/prometheus,prometheus/prometheus,keegancsmith/prometheus,alileza/prometheus,keegancsmith/prometheus,prometheus/prometheus,keegancsmith/prometheus,GoogleCloudPlatform/prometheus,GoogleCloudPlatform/prometheus,GoogleCloudPlatform/prometheus,keegancsmith/prometheus,prometheus/prometheus,alileza/prometheus,GoogleCloudPlatform/prometheus,prometheus/prometheus,alileza/prometheus,GoogleCloudPlatform/prometheus,alileza/prometheus,alileza/prometheus,keegancsmith/prometheus