chore: address PR feedback for test functionality

Co-Authored-By: Joe Moura <joao@crewai.com>

src/crewai/crew.py

@@ -6,6 +6,7 @@ from concurrent.futures import Future
 from hashlib import md5
 from typing import Any, Callable, Dict, List, Optional, Tuple, Union
 
+from langchain_core.language_models.base import BaseLanguageModel
 from pydantic import (
     UUID4,
     BaseModel,

src/crewai/utilities/evaluators/crew_evaluator_handler.py

@@ -2,7 +2,7 @@ import os
 from collections import defaultdict
 from typing import Any, Dict, List, Optional, Union
 
-from langchain.base_language.base_language_model import BaseLanguageModel
+from langchain_core.language_models.base import BaseLanguageModel
 from pydantic import BaseModel, Field, InstanceOf
 from rich.box import HEAVY_EDGE
 from rich.console import Console