Fix imports from model_config (#443)

Author: albertvillanova

docs/source/using-the-python-api.mdx

@@ -11,7 +11,7 @@ After that, simply run the pipeline and save the results.
 ```python
 import lighteval
 from lighteval.logging.evaluation_tracker import EvaluationTracker
-from lighteval.models.model_config import VLLMModelConfig
+from lighteval.models.vllm.vllm_model import VLLMModelConfig
 from lighteval.pipeline import ParallelismManager, Pipeline, PipelineParameters
 from lighteval.utils.utils import EnvConfig
 from lighteval.utils.imports import is_accelerate_available

src/lighteval/main_endpoint.py

@@ -93,7 +93,7 @@ def openai(
     Evaluate OPENAI models.
     """
     from lighteval.logging.evaluation_tracker import EvaluationTracker
-    from lighteval.models.model_config import OpenAIModelConfig
+    from lighteval.models.endpoints.openai_model import OpenAIModelConfig
     from lighteval.pipeline import EnvConfig, ParallelismManager, Pipeline, PipelineParameters
 
     env_config = EnvConfig(token=TOKEN, cache_dir=cache_dir)
@@ -317,7 +317,7 @@ def tgi(
     import yaml
 
     from lighteval.logging.evaluation_tracker import EvaluationTracker
-    from lighteval.models.model_config import TGIModelConfig
+    from lighteval.models.endpoints.tgi_model import TGIModelConfig
     from lighteval.pipeline import EnvConfig, ParallelismManager, Pipeline, PipelineParameters
 
     env_config = EnvConfig(token=TOKEN, cache_dir=cache_dir)