Rename hello_orchestration_starter to orchestration_starter for consistency

Author: AnatoliB

samples-v2/openai_agents/function_app.py

@@ -10,7 +10,7 @@
 
 @app.route(route="orchestrators/{functionName}")
 @app.durable_client_input(client_name="client")
-async def hello_orchestration_starter(req: func.HttpRequest, client):
+async def orchestration_starter(req: func.HttpRequest, client):
     function_name = req.route_params.get('functionName')
     instance_id = await client.start_new(function_name)
     response = client.create_check_status_response(req, instance_id)