Python: Fixed AutoGen migration and tool samples (#4027)

* Fixed ollama_chat_client sample

* Fixed ollama_chat_multimodal sample

* Fixed function_tool_with_approval_and_sessions sample

* Updated function_tool_with_session_injection sample

* Small clean-up

* Update 01_round_robin_group_chat.py

* Update 02_selector_group_chat.py

* Update 03_swarm.py

* Update 03_assistant_agent_thread_and_stream.py

* Update 04_agent_as_tool.py

* Resolved comments

python/samples/02-agents/providers/ollama/ollama_chat_client.py

@@ -3,7 +3,7 @@
 import asyncio
 from datetime import datetime
 
-from agent_framework import tool
+from agent_framework import Message, tool
 from agent_framework.ollama import OllamaChatClient
 
 """
@@ -29,16 +29,17 @@ def get_time():
 async def main() -> None:
     client = OllamaChatClient()
     message = "What time is it? Use a tool call"
+    messages = [Message(role="user", text=message)]
     stream = False
     print(f"User: {message}")
     if stream:
         print("Assistant: ", end="")
-        async for chunk in client.get_response(message, tools=get_time, stream=True):
+        async for chunk in client.get_response(messages, tools=get_time, stream=True):
             if str(chunk):
                 print(str(chunk), end="")
         print("")
     else:
-        response = await client.get_response(message, tools=get_time)
+        response = await client.get_response(messages, tools=get_time)
         print(f"Assistant: {response}")
 
 

python/samples/02-agents/providers/ollama/ollama_chat_multimodal.py

@@ -40,7 +40,7 @@ async def test_image() -> None:
         ],
     )
 
-    response = await client.get_response(message)
+    response = await client.get_response([message])
     print(f"Image Response: {response}")