Function build_conv_bwd_data_graph 

pub fn build_conv_bwd_data_graph(
    dtype: DtypeTag,
    dy_dims: &[i64],
    w_dims: &[i64],
    dx_dims: &[i64],
    conv: &ConvDescParams,
    layout: TensorLayout,
) -> OperationGraphSpec

Build the spec-side conv-bwd-data op graph.