Add information about --log-metrics flag to logging documentation
#1278
| Job | Run time |
|---|---|
| 13m 2s | |
| 13m 2s | |
| 5m 22s | |
| 7m 2s | |
| 16m 38s | |
| 16m 38s | |
| 6m 20s | |
| 6m 20s | |
| 6m 1s | |
| 6m 1s | |
| 14m 45s | |
| 14m 45s | |
| 7m 48s | |
| 7m 48s | |
| 2h 21m 32s |