[Vertex AI] Fix testCountTokens_jsonSchema integration test
#745
| Job | Run time |
|---|---|
| 59s | |
| 5m 9s | |
| 3m 41s | |
| 3m 50s | |
| 3m 6s | |
| 5m 52s | |
| 1m 55s | |
| 21m 5s | |
| 2m 26s | |
| 1m 52s | |
| 2m 12s | |
| 2m 4s | |
| 1m 50s | |
| 2m 2s | |
| 58m 3s |