test(openai-agents): Replace mocks with httpx in non-error single-response tests
#11680
| Job | Run time |
|---|---|
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| 2m 13s | |
| 3m 31s | |
| 3m 58s | |
| 1m 51s | |
| 2m 21s | |
| 2m 26s | |
| 3m 50s | |
| 4s | |
| 25m 13s |