Remove artifact_v4_upgrade feature flag logic and related PR checks
#8907
| Job | Run time |
|---|---|
| 48s | |
| 3m 52s | |
| 3m 44s | |
| 3m 37s | |
| 3m 36s | |
| 6m 4s | |
| 8m 10s | |
| 7m 44s | |
| 6m 45s | |
| 7m 21s | |
| 10m 0s | |
| 3m 56s | |
| 5m 45s | |
| 1h 11m 22s |