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.
{
public:
    CNetProcessingCleanup() {}
    ~CNetProcessingCleanup() {
        
        mapOrphanTransactions.clear();
        mapOrphanTransactionsByPrev.clear();
        g_orphans_by_wtxid.clear();
    }
};
static CNetProcessingCleanup instance_of_cnetprocessingcleanup;