fix list.__add__ to use the expected type
#33424
| Job | Run time |
|---|---|
| 11s | |
| 4m 58s | |
| 4m 55s | |
| 4m 51s | |
| 4m 32s | |
| 2m 30s | |
| 4m 8s | |
| 4m 21s | |
| 2m 37s | |
| 4m 14s | |
| 4m 3s | |
| 4m 9s | |
| 4m 39s | |
| 3m 27s | |
| 4m 5s | |
| 4m 15s | |
| 4m 28s | |
| 2m 35s | |
| 4m 11s | |
| 2m 51s | |
| 4m 54s | |
| 3m 28s | |
| 1m 51s | |
| 2m 47s | |
| 3m 23s | |
| 3m 24s | |
| 3m 47s | |
| 3m 5s | |
| 2m 38s | |
| 1m 37s | |
| 2m 56s | |
| 3m 18s | |
| 7m 40s | |
| 3m 49s | |
| 3m 23s | |
| 1m 28s | |
| 2m 33s | |
| 1m 41s | |
| 1m 43s | |
| 2h 15m 25s |