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/distributions/open-benchmark/open_benchmark.py

@@ -43,7 +43,7 @@ def get_inference_providers() -> tuple[list[Provider], dict[str, list[ProviderMo
             "openai",
             [
                 ProviderModelEntry(
-                    provider_model_id="openai/gpt-4o",
+                    provider_model_id="gpt-4o",
                     model_type=ModelType.llm,
                 )
             ],
@@ -53,7 +53,7 @@ def get_inference_providers() -> tuple[list[Provider], dict[str, list[ProviderMo
             "anthropic",
             [
                 ProviderModelEntry(
-                    provider_model_id="anthropic/claude-3-5-sonnet-latest",
+                    provider_model_id="claude-3-5-sonnet-latest",
                     model_type=ModelType.llm,
                 )
             ],
@@ -206,13 +206,6 @@ def get_distribution_template() -> DistributionTemplate:
                 uri="huggingface://datasets/llamastack/math_500?split=test",
             ),
         ),
-        DatasetInput(
-            dataset_id="bfcl",
-            purpose=DatasetPurpose.eval_messages_answer,
-            source=URIDataSource(
-                uri="huggingface://datasets/llamastack/bfcl_v3?split=train",
-            ),
-        ),
         DatasetInput(
             dataset_id="ifeval",
             purpose=DatasetPurpose.eval_messages_answer,
@@ -250,11 +243,6 @@ def get_distribution_template() -> DistributionTemplate:
             dataset_id="math_500",
             scoring_functions=["basic::regex_parser_math_response"],
         ),
-        BenchmarkInput(
-            benchmark_id="meta-reference-bfcl",
-            dataset_id="bfcl",
-            scoring_functions=["basic::bfcl"],
-        ),
         BenchmarkInput(
             benchmark_id="meta-reference-ifeval",
             dataset_id="ifeval",

llama_stack/distributions/open-benchmark/run.yaml

@@ -136,14 +136,14 @@ inference_store:
   db_path: ${env.SQLITE_STORE_DIR:=~/.llama/distributions/open-benchmark}/inference_store.db
 models:
 - metadata: {}
-  model_id: openai/gpt-4o
+  model_id: gpt-4o
   provider_id: openai
-  provider_model_id: openai/gpt-4o
+  provider_model_id: gpt-4o
   model_type: llm
 - metadata: {}
-  model_id: anthropic/claude-3-5-sonnet-latest
+  model_id: claude-3-5-sonnet-latest
   provider_id: anthropic
-  provider_model_id: anthropic/claude-3-5-sonnet-latest
+  provider_model_id: claude-3-5-sonnet-latest
   model_type: llm
 - metadata: {}
   model_id: gemini/gemini-1.5-flash
@@ -188,12 +188,6 @@ datasets:
     uri: huggingface://datasets/llamastack/math_500?split=test
   metadata: {}
   dataset_id: math_500
-- purpose: eval/messages-answer
-  source:
-    type: uri
-    uri: huggingface://datasets/llamastack/bfcl_v3?split=train
-  metadata: {}
-  dataset_id: bfcl
 - purpose: eval/messages-answer
   source:
     type: uri
@@ -228,11 +222,6 @@ benchmarks:
   - basic::regex_parser_math_response
   metadata: {}
   benchmark_id: meta-reference-math-500
-- dataset_id: bfcl
-  scoring_functions:
-  - basic::bfcl
-  metadata: {}
-  benchmark_id: meta-reference-bfcl
 - dataset_id: ifeval
   scoring_functions:
   - basic::ifeval