gh-138890: Add clearer message when deleting builtins with del
#4250
| Job | Run time |
|---|---|
| 9m 50s | |
| 15m 13s | |
| 10m 50s | |
| 14m 7s | |
| 23m 53s | |
| 23m 59s | |
| 18m 11s | |
| 26m 30s | |
| 13m 42s | |
| 5m 36s | |
| 11m 18s | |
| 7m 6s | |
| 22m 37s | |
| 11m 3s | |
| 11m 2s | |
| 7m 15s | |
| 18m 10s | |
| 4h 10m 22s |