Make test client's fileUploadMutation work for more input variable shapes
#3003
| Job | Run time |
|---|---|
| 6m 19s | |
| 6m 0s | |
| 8m 3s | |
| 17m 24s | |
| 15m 42s | |
| 14m 25s | |
| 6m 15s | |
| 5m 55s | |
| 6m 56s | |
| 1h 26m 59s |