Handle fireworks ai tool calling response (#10130)

* feat(fireworks_ai/chat): handle tool calling with fireworks ai correctly

Fixes https://github.com/BerriAI/litellm/issues/7209

* fix(utils.py): handle none type in message

* fix: fix model name in test

* fix(utils.py): fix validate check for openai messages

* fix: fix model returned

* fix(main.py): fix text completion routing

* test: update testing

* test: skip test - cohere having RBAC issues

litellm/main.py

@@ -1435,6 +1435,7 @@ def completion(  # type: ignore # noqa: PLR0915
                     custom_llm_provider=custom_llm_provider,
                     encoding=encoding,
                     stream=stream,
+                    provider_config=provider_config,
                 )
             except Exception as e:
                 ## LOGGING - log the original exception returned
@@ -1596,6 +1597,37 @@ def completion(  # type: ignore # noqa: PLR0915
                     additional_args={"headers": headers},
                 )
             response = _response
+        elif custom_llm_provider == "fireworks_ai":
+            ## COMPLETION CALL
+            try:
+                response = base_llm_http_handler.completion(
+                    model=model,
+                    messages=messages,
+                    headers=headers,
+                    model_response=model_response,
+                    api_key=api_key,
+                    api_base=api_base,
+                    acompletion=acompletion,
+                    logging_obj=logging,
+                    optional_params=optional_params,
+                    litellm_params=litellm_params,
+                    timeout=timeout,  # type: ignore
+                    client=client,
+                    custom_llm_provider=custom_llm_provider,
+                    encoding=encoding,
+                    stream=stream,
+                    provider_config=provider_config,
+                )
+            except Exception as e:
+                ## LOGGING - log the original exception returned
+                logging.post_call(
+                    input=messages,
+                    api_key=api_key,
+                    original_response=str(e),
+                    additional_args={"headers": headers},
+                )
+                raise e
+
         elif custom_llm_provider == "groq":
             api_base = (
                 api_base  # for deepinfra/perplexity/anyscale/groq/friendliai we check in get_llm_provider and pass in the api base from there