Function reduce::common::generate_random_npos_result

pub fn generate_random_npos_result(
    voter_count: u64, 
    target_count: u64, 
    to_elect: usize, 
    rng: impl RngCore, 
    election_type: ElectionType
) -> (ElectionResult<u64, Perbill>, Vec<u64>, Vec<(u64, VoteWeight, Vec<u64>)>, BTreeMap<u64, VoteWeight>)