For every peer expose through `getpeerinfo` RPC whether or not we selected them as HB peers, and whether or not they selected us as HB peers.

Suggestion by @gmaxwell.
vInvTx.pop_back();
                        uint256 hash = *it;
                        CInv inv(state.m_wtxid_relay ? MSG_WTX : MSG_TX, hash);
                        
                        pto->m_tx_relay->setInventoryTxToSend.erase(it);
                        
                        if (pto->m_tx_relay->filterInventoryKnown.contains(hash)) {
                            continue;
                        }
                        
                        auto txinfo = m_mempool.info(ToGenTxid(inv));
                        if (!txinfo.tx) {
                            continue;
                        }
                        auto txid = txinfo.tx->GetHash();
                        auto wtxid = txinfo.tx->GetWitnessHash();
                        
                        if (txinfo.fee < filterrate.GetFee(txinfo.vsize)) {
                            continue;
                        }
                        if (pto->m_tx_relay->pfilter && !pto->m_tx_relay->pfilter->IsRelevantAndUpdate(*txinfo.tx)) continue;
                        
                        State(pto->GetId())->m_recently_announced_invs.insert(hash);
                        vInv.push_back(inv);
                        nRelayedTransactions++;
                        {
                            
                            while (!vRelayExpiration.empty() && vRelayExpiration.front().first < count_microseconds(current_time))
                            {
                                mapRelay.erase(vRelayExpiration.front().second);