Crop transactions before sending

Author: abyss7

ydb/core/kqp/executer_actor/kqp_executer_impl.h

@@ -1872,9 +1872,8 @@ class TKqpExecuterBase : public TActorBootstrapped<TDerived> {
     void PassAway() override {
         YQL_ENSURE(AlreadyReplied && ResponseEv);
         FillResponseStats();
-        this->Send(Target, ResponseEv.release());
-
         Request.Transactions.crop(0);
+        this->Send(Target, ResponseEv.release());
 
         for (auto channelPair: ResultChannelProxies) {
             LOG_D("terminate result channel " << channelPair.first << " proxy at " << channelPair.second->SelfId());