Use chain-spec-builder where possible in runtime
#2546
| Job | Run time |
|---|---|
| 3s | |
| 45m 55s | |
| 32m 42s | |
| 31m 14s | |
| 1h 39m 13s | |
| 23m 59s | |
| 38m 31s | |
| 23m 48s | |
| 23m 42s | |
| 23m 36s | |
| 22m 52s | |
| 23m 20s | |
| 24m 0s | |
| 1s | |
| 6h 52m 56s |