Use std::time::Duration and std::time::SystemTime in the crux_time API
#1607
| Job | Run time |
|---|---|
| 1m 7s | |
| 3s | |
| 2m 25s | |
| 2m 22s | |
| 7m 52s | |
| 1m 8s | |
| 1m 14s | |
| 2m 24s | |
| 1m 46s | |
| 20m 21s |