AgentOps ENG-525: Decouple CrewAI and AgentOps (#1033)

* Make AgentOps import optional upon AGENTOPS_API_KEY
    being set

Co-authored-by: João Moura <joaomdmoura@gmail.com>

src/crewai/utilities/evaluators/task_evaluator.py

@@ -1,3 +1,4 @@
+import os
 from typing import List
 
 from langchain_openai import ChatOpenAI
@@ -6,16 +7,23 @@ from pydantic import BaseModel, Field
 from crewai.utilities import Converter
 from crewai.utilities.pydantic_schema_parser import PydanticSchemaParser
 
-agentops = None
-try:
-    from agentops import track_agent
-except ImportError:
-
-    def track_agent(name):
+def mock_agent_ops_provider():
+    def track_agent():
         def noop(f):
             return f
 
         return noop
+    return track_agent
+
+agentops = None
+
+if os.environ.get("AGENTOPS_API_KEY"):
+    try:
+        from agentops import track_agent
+    except ImportError:
+        track_agent = mock_agent_ops_provider()
+else:
+    track_agent = mock_agent_ops_provider()
 
 
 class Entity(BaseModel):