[Vertex AI] Add ImagenModelConfig for model-level config params
#843
| Job | Run time |
|---|---|
| 6m 25s | |
| 1m 20s | |
| 2m 57s | |
| 3m 5s | |
| 1m 52s | |
| 5m 43s | |
| 2m 16s | |
| 2m 25s | |
| 2m 7s | |
| 2m 6s | |
| 1m 49s | |
| 2m 6s | |
| 1m 53s | |
| 3m 16s | |
| 39m 20s |