Tests TxUsage::WriteToTopic_Invalid_* (ydb-platform#12475)

Author: Alek5andr-Kotov

ydb/core/kqp/session_actor/kqp_session_actor.cpp

@@ -2275,6 +2275,10 @@ class TKqpSessionActor : public TActorBootstrapped<TKqpSessionActor> {
         PassAway();
     }
 
+    void HandleFinalCleanup(TEvKqp::TEvQueryRequest::TPtr& ev) {
+        ReplyProcessError(ev->Sender, ev->Cookie, Ydb::StatusIds::BAD_SESSION, "Session is under shutdown");
+    }
+
     STFUNC(ReadyState) {
         try {
             switch (ev->GetTypeRewrite()) {
@@ -2406,6 +2410,7 @@ class TKqpSessionActor : public TActorBootstrapped<TKqpSessionActor> {
                 hFunc(TEvents::TEvUndelivered, HandleNoop);
                 hFunc(TEvKqpSnapshot::TEvCreateSnapshotResponse, Handle);
                 hFunc(NWorkload::TEvContinueRequest, HandleNoop);
+                hFunc(TEvKqp::TEvQueryRequest, HandleFinalCleanup);
             }
         } catch (const yexception& ex) {
             InternalError(ex.what());