test(openai-agents): Replace mocks with httpx in non-error single-response tests
#8972
| Job | Run time |
|---|---|
| 6m 18s | |
| 5m 49s | |
| 7m 24s | |
| 3m 52s | |
| 7m 26s | |
| 8m 42s | |
| 3m 3s | |
| 6m 47s | |
| 2s | |
| 49m 23s |