metal : add opt_step_adamw and op_sum (#16529) #244

Job	Run time
server (ADDRESS, RelWithDebInfo)	1m 55s
server (UNDEFINED, RelWithDebInfo)	1m 9s
WebUI Setup	17s
server-windows	8m 24s
server (Release)	1m 22s
WebUI Check	1m 13s
WebUI Build	48s
Run WebUI tests	2m 57s
server-build (ADDRESS, RelWithDebInfo)	12m 28s
server-build (UNDEFINED, RelWithDebInfo)	16m 9s
server-build (Release)	8m 22s
	55m 4s

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