feat(dataset api): (1.4/n) fix resolver signature mismatch (#1658)

# What does this PR do?
- fix datasets api signature mis-match so that llama stack run can start

[//]: # (If resolving an issue, uncomment and update the line below)
[//]: # (Closes #[issue-number])

## Test Plan
```
llama stack run
```
<img width="626" alt="image"
src="https://github.com/user-attachments/assets/59072d1a-ccb6-453a-80e8-d87419896c41"
/>


[//]: # (## Documentation)

llama_stack/providers/inline/post_training/torchtune/recipes/lora_finetuning_single_device.py

@@ -328,7 +328,7 @@ class LoraFinetuningSingleDevice:
         batch_size: int,
     ) -> Tuple[DistributedSampler, DataLoader]:
         async def fetch_rows(dataset_id: str):
-            return await self.datasetio_api.get_rows_paginated(
+            return await self.datasetio_api.iterrows(
                 dataset_id=dataset_id,
                 rows_in_page=-1,
             )