Add test cassettes for tool usage events

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

tests/utilities/cassettes/test_tools_emits_finished_events_with_dict_result.yaml

@@ -0,0 +1,92 @@
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+      a helpful assistant that returns structured data\nYour personal goal is: Return
+      a dictionary result\nYou ONLY have access to the following tools, and should
+      NEVER make up tools that are not listed here:\n\nTool Name: dict_result\nTool
+      Arguments: {}\nTool Description: Return a dictionary result\n\nIMPORTANT: Use
+      the following format in your response:\n\n```\nThought: you should always think
+      about what to do\nAction: the action to take, only one name of [dict_result],
+      just the name, exactly as it''s written.\nAction Input: the input to the action,
+      just a simple JSON object, enclosed in curly braces, using \" to wrap keys and
+      values.\nObservation: the result of the action\n```\n\nOnce all necessary information
+      is gathered, return the following format:\n\n```\nThought: I now know the final
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+      summary.\n\nBegin! This is VERY important to you, use the tools available and
+      give your best Final Answer, your job depends on it!\n\nThought:"}], "model":
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tests/utilities/cassettes/test_tools_emits_finished_events_with_none_result.yaml

@@ -0,0 +1,91 @@
+interactions:
+- request:
+    body: '{"messages": [{"role": "system", "content": "You are base_agent. You are
+      a helpful assistant that returns None\nYour personal goal is: Return None as
+      result\nYou ONLY have access to the following tools, and should NEVER make up
+      tools that are not listed here:\n\nTool Name: none_result\nTool Arguments: {}\nTool
+      Description: Return None as result\n\nIMPORTANT: Use the following format in
+      your response:\n\n```\nThought: you should always think about what to do\nAction:
+      the action to take, only one name of [none_result], just the name, exactly as
+      it''s written.\nAction Input: the input to the action, just a simple JSON object,
+      enclosed in curly braces, using \" to wrap keys and values.\nObservation: the
+      result of the action\n```\n\nOnce all necessary information is gathered, return
+      the following format:\n\n```\nThought: I now know the final answer\nFinal Answer:
+      the final answer to the original input question\n```"}, {"role": "user", "content":
+      "\nCurrent Task: Return None as result\n\nThis is the expected criteria for
+      your final answer: None\nyou MUST return the actual complete content as the
+      final answer, not a summary.\n\nBegin! This is VERY important to you, use the
+      tools available and give your best Final Answer, your job depends on it!\n\nThought:"}],
+      "model": "gpt-4o-mini", "stop": ["\nObservation:"]}'
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tests/utilities/cassettes/test_tools_emits_finished_events_with_string_result.yaml

@@ -0,0 +1,93 @@
+interactions:
+- request:
+    body: '{"messages": [{"role": "system", "content": "You are base_agent. You are
+      a helpful assistant that just says hi\nYour personal goal is: Just say hi\nYou
+      ONLY have access to the following tools, and should NEVER make up tools that
+      are not listed here:\n\nTool Name: say_hi\nTool Arguments: {}\nTool Description:
+      Say hi\n\nIMPORTANT: Use the following format in your response:\n\n```\nThought:
+      you should always think about what to do\nAction: the action to take, only one
+      name of [say_hi], just the name, exactly as it''s written.\nAction Input: the
+      input to the action, just a simple JSON object, enclosed in curly braces, using
+      \" to wrap keys and values.\nObservation: the result of the action\n```\n\nOnce
+      all necessary information is gathered, return the following format:\n\n```\nThought:
+      I now know the final answer\nFinal Answer: the final answer to the original
+      input question\n```"}, {"role": "user", "content": "\nCurrent Task: Just say
+      hi\n\nThis is the expected criteria for your final answer: hi\nyou MUST return
+      the actual complete content as the final answer, not a summary.\n\nBegin! This
+      is VERY important to you, use the tools available and give your best Final Answer,
+      your job depends on it!\n\nThought:"}], "model": "gpt-4o-mini", "stop": ["\nObservation:"]}'
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