ci: split out multiprocess linting to a separate step on Actions
#333
| Job | Run time |
|---|---|
| 32s | |
| 20s | |
| 1m 3s | |
| 56s | |
| 55s | |
| 56s | |
| 58s | |
| 54s | |
| 6m 3s | |
| 6m 0s | |
| 3m 50s | |
| 6m 1s | |
| 6m 0s | |
| 5m 59s | |
| 5m 59s | |
| 6m 0s | |
| 3m 34s | |
| 3m 58s | |
| 0s | |
| 1s | |
| 1s | |
| 1s | |
| 1s | |
| 1s | |
| 1h 0m 3s |