[3.2] Refactor producer_plugin to consolidate controller push_transaction calls

libraries/chain/include/eosio/chain/unapplied_transaction_queue.hpp

@@ -172,6 +172,7 @@ class unapplied_transaction_queue {
             --incoming_count;
          queue.get<by_trx_id>().modify( itr, [](auto& un){
             un.trx_type = trx_enum_type::persisted;
+            un.next = nullptr; // persisted already have ack'ed initial trace
          } );
       }
    }