Add large topk tests

[chasingegg]

Faiss will go to different branches when topk is larger than 100, this pr helps to cover these cases.

int distance_compute_min_k_reservoir = 100;

void knn_inner_product(
        const float* x,
        const float* y,
        size_t d,
        size_t nx,
        size_t ny,
        float_minheap_array_t* ha,
        const BitsetView bitset) {
    if (ha->k < distance_compute_min_k_reservoir) {
        HeapResultHandler<CMin<float, int64_t>> res(
                ha->nh, ha->val, ha->ids, ha->k);
        ....
    } else {
        ReservoirResultHandler<CMin<float, int64_t>> res(
                ha->nh, ha->val, ha->ids, ha->k);
        .....
    }
}

Also, change ivf binary metric test a little bit to handle cases where result num less than topk.
/kind improvement

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[alexanderguzhva]

/lgtm