fix: Pass partition_image kwargs downstream (#1426)
`partition_pdf` allows for passing a `model_name` parameter. Given the
similarity between the image and PDF pipelines, the expected behavior is
that `partition_image` should support the same parameter, but
`partition_image` was unintentionally not passing along its `kwargs`.
This was corrected by adding the kwargs to the downstream call.
#### Testing:
```python
from unstructured.partition.image import partition_image
output1 = partition_image("example-docs/layout-parser-paper-fast.jpg", model_name="detectron2_onnx")
output2 = partition_image("example-docs/layout-parser-paper-fast.jpg", model_name="yolox")
# These shouldn't be the same, since they were produced using different models.
assert output1 != output2
```
The assertion should fail on `main`, but pass on this branch.
