Inference to use provider resource id to register and validate (#428)

This PR changes the way model id gets translated to the final model name
that gets passed through the provider.
Major changes include:
1) Providers are responsible for registering an object and as part of
the registration returning the object with the correct provider specific
name of the model provider_resource_id
2) To help with the common look ups different names a new ModelLookup
class is created.



Tested all inference providers including together, fireworks, vllm,
ollama, meta reference and bedrock

llama_stack/providers/inline/scoring/llm_as_judge/scoring_fn/llm_as_judge_scoring_fn.py

@@ -62,7 +62,7 @@ class LlmAsJudgeScoringFn(BaseScoringFn):
         )
 
         judge_response = await self.inference_api.chat_completion(
-            model=fn_def.params.judge_model,
+            model_id=fn_def.params.judge_model,
             messages=[
                 {
                     "role": "user",