Python: [BREAKING] Replace Hosted*Tool classes with tool methods (#3634)

* Replace Hosted*Tool classes with client static factory methods

* fixed failing test

* mypy fix

* mypy fix 2

* declarative mypy fix

* addressed comments

* ToolProtocol removal

* fixed test

* agents mypy fix

* fix failing tests

* mypy fix

* addressed comments

* fixed tests

* addressed comments + added factory method overrides for azureai v2 client

* mypy fix

* added kwargs to azureai tool methods

* fixed in test

* _sessions fix

* test fix

python/samples/getting_started/workflows/agents/magentic_workflow_as_agent.py

@@ -4,7 +4,6 @@ import asyncio
 
 from agent_framework import (
     Agent,
-    HostedCodeInterpreterTool,
 )
 from agent_framework.openai import OpenAIChatClient, OpenAIResponsesClient
 from agent_framework.orchestrations import MagenticBuilder
@@ -32,12 +31,16 @@ async def main() -> None:
         client=OpenAIChatClient(model_id="gpt-4o-search-preview"),
     )
 
+    # Create code interpreter tool using instance method
+    coder_client = OpenAIResponsesClient()
+    code_interpreter_tool = coder_client.get_code_interpreter_tool()
+
     coder_agent = Agent(
         name="CoderAgent",
         description="A helpful assistant that writes and executes code to process and analyze data.",
         instructions="You solve questions using code. Please provide detailed analysis and computation process.",
-        client=OpenAIResponsesClient(),
-        tools=HostedCodeInterpreterTool(),
+        client=coder_client,
+        tools=code_interpreter_tool,
     )
 
     # Create a manager agent for orchestration