test(openai-agents): Replace mocks with httpx in non-error single-response tests
#6359
| Job | Run time |
|---|---|
| 1m 30s | |
| 3m 21s | |
| 2m 10s | |
| 3m 30s | |
| 2m 9s | |
| 1m 42s | |
| 2m 52s | |
| 1m 28s | |
| 4s | |
| 18m 46s |