mlir: Modify BatchOpInterface to allow generating more than one operation
#6485
| Job | Run time |
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| 4m 37s | |
| 4m 18s | |
| 4m 5s | |
| 3m 35s | |
| 2m 11s | |
| 10m 26s | |
| 11m 52s | |
| 9m 11s | |
| 54m 49s |