test(openai-agents): Replace mocks with httpx in non-error single-response tests
#6877
| Job | Run time |
|---|---|
| 3m 40s | |
| 4m 28s | |
| 2m 31s | |
| 2m 58s | |
| 3m 54s | |
| 3m 52s | |
| 1m 41s | |
| 2m 17s | |
| 3m 22s | |
| 5m 51s | |
| 4s | |
| 34m 38s |