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

llama_stack/core/stack.py

@@ -105,12 +105,12 @@ async def register_resources(run_config: StackRunConfig, impls: dict[Api, Any]):
 
         method = getattr(impls[api], register_method)
         for obj in objects:
-            logger.debug(f"registering {rsrc.capitalize()} {obj} for provider {obj.provider_id}")
-
-            # Do not register models on disabled providers
-            if hasattr(obj, "provider_id") and (not obj.provider_id or obj.provider_id == "__disabled__"):
-                logger.debug(f"Skipping {rsrc.capitalize()} registration for disabled provider.")
-                continue
+            if hasattr(obj, "provider_id"):
+                # Do not register models on disabled providers
+                if not obj.provider_id or obj.provider_id == "__disabled__":
+                    logger.debug(f"Skipping {rsrc.capitalize()} registration for disabled provider.")
+                    continue
+                logger.debug(f"registering {rsrc.capitalize()} {obj} for provider {obj.provider_id}")
 
             # we want to maintain the type information in arguments to method.
             # instead of method(**obj.model_dump()), which may convert a typed attr to a dict,