Function flodl_instance_norm 

pub unsafe extern "C" fn flodl_instance_norm(
    input: FlodlTensor,
    weight: FlodlTensor,
    bias: FlodlTensor,
    running_mean: FlodlTensor,
    running_var: FlodlTensor,
    use_input_stats: i32,
    momentum: f64,
    eps: f64,
    result: *mut FlodlTensor,
) -> *mut i8