Add more data to `Server-Timing` header #2001

Loadtest Results

param	head	v11.2.0	main
bytes_in.mean	1030.6095338240448	1030.6058936133186	1030.44612531154
bytes_in.total	17641974	17766615	17778287
bytes_out.mean	3848.186704054212	3848.1898602007077	3849.9681214861184
bytes_out.total	65873260	66338945	66423500
duration	60013328691	60007568446	60000541459
errors.0	400 Bad Request	400 Bad Request	400 Bad Request
latencies.50th	1543228	1513099	1500324
latencies.90th	4665459	4403450	4507392
latencies.95th	22087827	22075538	22160719
latencies.99th	23782792	23859561	23766983
latencies.max	38506264	43749288	40571518
latencies.mean	3504011	3478994	3475987
latencies.min	210902	203901	202701
latencies.total	59981669037	59974381549	59971212020
rate	285.23663615024793	287.28042889311774	287.54740508115987
requests	17118	17239	17253
status_codes.200	9338	9404	9411
status_codes.201	1556	1567	1569
status_codes.204	4668	4701	4704
status_codes.400	1556	1567	1569
success	0.9091015305526341	0.9091014560009281	0.9090592940358191
throughput	259.3028794418732	261.16066418098427	261.3818510557247
wait	1431012	1468708	3624617