Function call_forkchoice_updated 

pub(crate) async fn call_forkchoice_updated<N, P: EngineApiValidWaitExt<N>>(
    provider: P,
    message_version: EngineApiMessageVersion,
    forkchoice_state: ForkchoiceState,
    payload_attributes: Option<PayloadAttributes>,
) -> TransportResult<ForkchoiceUpdated>

Calls the correct engine_forkchoiceUpdated method depending on the given EngineApiMessageVersion, using the provided forkchoice state and payload attributes for the actual engine api message call.