test: avoid sharing echo.Responses across tests
#37710
| Job | Run time |
|---|---|
| 13s | |
| 3m 54s | |
| 59s | |
| 5m 31s | |
| 2m 6s | |
| 6m 11s | |
| 3m 7s | |
| 10m 54s | |
| 4m 43s | |
| 7m 49s | |
| 4m 49s | |
| 7m 20s | |
| 7m 24s | |
| 1m 57s | |
| 0s | |
| 6m 4s | |
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| 7s | |
| 0s | |
| 1h 13m 8s |