fix: Remove bfcl scoring function as not supported (#3281)

# What does this PR do?
BFCL scoring function is not supported, removing it. 

Also minor fixes as the llama stack run is broken for open-benchmark for
test plan verification
1. Correct the model paths for supported models
2. Fix another issue as there is no `provider_id` for DatasetInput but
logger assumes it exists.
``` 
File "/Users/swapna942/llama-stack/llama_stack/core/stack.py", line 332, in construct_stack
    await register_resources(run_config, impls)
  File "/Users/swapna942/llama-stack/llama_stack/core/stack.py", line 108, in register_resources
    logger.debug(f"registering {rsrc.capitalize()} {obj} for provider {obj.provider_id}")
                                                                       ^^^^^^^^^^^^^^^
  File "/Users/swapna942/llama-stack/.venv/lib/python3.13/site-packages/pydantic/main.py", line 991, in __getattr__
    raise AttributeError(f'{type(self).__name__!r} object has no attribute {item!r}')
AttributeError: 'DatasetInput' object has no attribute 'provider_id'
```

## Test Plan
```llama stack build --distro open-benchmark --image-type venv``` and run the server succeeds


Issue Link: https://github.com/llamastack/llama-stack/issues/3282

docs/source/references/llama_stack_client_cli_reference.md

@@ -478,7 +478,6 @@ llama-stack-client scoring_functions list
 ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━┓
 ┃ identifier                                 ┃ provider_id  ┃ description                                                   ┃ type             ┃
 ┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━┩
-│ basic::bfcl                                │ basic        │ BFCL complex scoring                                          │ scoring_function │
 │ basic::docvqa                              │ basic        │ DocVQA Visual Question & Answer scoring function              │ scoring_function │
 │ basic::equality                            │ basic        │ Returns 1.0 if the input is equal to the target, 0.0          │ scoring_function │
 │                                            │              │ otherwise.                                                    │                  │