Add readResponseTime/writeResponseTime for storage and volume metrics, and add metric constants.#908

wisererik merged 1 commit intosodafoundation:mastersodafoundation/delfin:masterfrom

JiuyunZhao:jiuyunzhao_new_metrics_20220630JiuyunZhao/delfin:jiuyunzhao_new_metrics_20220630Copy head branch name to clipboard