chat: update setup_assistant to use gpt-4o

[rmackay9]

This updates the setup_assistant.py script which is used to create assistants on the OpenAI server.

The changes include:

• Assistant uses "gpt-4o" which is the latest model from OpenAI
• the "code interpreter" tool is disabled. this was never required actually
• mavlink xml files are converted to json before uploading. the assistant is not capable of parsing xml files it seems (see here) so the xml files were never actually being used.
• uploaded files are added to a "vector store". This is because of an API change and was not required previously

This has been tested

stant_setup (chat-assistant-setup-4o)$ python setup_assistant.py --upgrade
Starting assistant setup
setup_assistant: parsed function file: get_vehicle_type.json
setup_assistant: parsed function file: get_parameter.json
setup_assistant: parsed function file: get_wakeup_timers.json
setup_assistant: parsed function file: get_vehicle_location_and_yaw.json
setup_assistant: parsed function file: send_mavlink_set_position_target_global_int.json
setup_assistant: parsed function file: get_vehicle_state.json
setup_assistant: parsed function file: get_location_plus_offset.json
setup_assistant: parsed function file: send_mavlink_command_int.json
setup_assistant: parsed function file: get_location_plus_dist_at_bearing.json
setup_assistant: parsed function file: get_parameter_description.json
setup_assistant: parsed function file: delete_wakeup_timers.json
setup_assistant: parsed function file: set_parameter.json
setup_assistant: parsed function file: get_mavlink_message.json
setup_assistant: parsed function file: get_current_datetime.json
setup_assistant: parsed function file: get_mode_mapping.json
setup_assistant: parsed function file: get_all_parameters.json
setup_assistant: parsed function file: set_wakeup_timer.json
setup_assistant: parsed function file: get_available_mavlink_messages.json
setup_assistant: downloaded file: minimal.xml
setup_assistant: downloaded file: common.xml
setup_assistant: downloaded file: ardupilotmega.xml
setup_assistant: using existing assistant: ArduPilot Vehicle Control via MAVLink id:asst_hDdE8oKgzdoWJMpfc4dQVvp1
setup_assistant: deleted existing file: rover_modes.txt
setup_assistant: uploaded: rover_modes.txt
setup_assistant: deleted existing file: plane_flightmodes.txt
setup_assistant: uploaded: plane_flightmodes.txt
setup_assistant: deleted existing file: copter_flightmodes.txt
setup_assistant: uploaded: copter_flightmodes.txt
setup_assistant: deleted existing file: assistant_instructions.txt
setup_assistant: uploaded: assistant_instructions.txt
setup_assistant: deleted existing file: sub_modes.txt
setup_assistant: uploaded: sub_modes.txt
setup_assistant: deleted existing file: minimal.xml.json
setup_assistant: uploaded: minimal.xml.json
setup_assistant: deleted existing file: common.xml.json
setup_assistant: uploaded: common.xml.json
setup_assistant: deleted existing file: ardupilotmega.xml.json
setup_assistant: uploaded: ardupilotmega.xml.json
deleting empty vector store id:vs_Cp3XgCX4e2uHvn1VPggcrHtX name:ArduPilot Vehicle Control via MAVLink vector_store
setup_assistant: created vector store id: vs_kBrThD2IjlQeDu0aZvccbpG1 name:ArduPilot Vehicle Control via MAVLink vector_store files:8
setup_assistant: updating assistant vector store to id:vs_kBrThD2IjlQeDu0aZvccbpG1 name:ArduPilot Vehicle Control via MAVLink vector_store
setup_assistant: deleted local file: minimal.xml
setup_assistant: deleted local file: common.xml
setup_assistant: deleted local file: ardupilotmega.xml
setup_assistant: deleted local file: minimal.xml.json
setup_assistant: deleted local file: common.xml.json
setup_assistant: deleted local file: ardupilotmega.xml.json
Assistant setup complete

[rmackay9]

Finally passing the python cleanliness tests.. :-)