Revert "Stable-24-1 cs patch 2 (ydb-platform#2145)"

This reverts commit 7d89162.

Author: ivanmorozov333

ydb/core/tx/columnshard/normalizer/abstract/abstract.h

@@ -101,7 +101,7 @@ namespace NKikimr::NOlap {
     public:
         TNormalizationController(std::shared_ptr<IStoragesManager> storagesManager, const std::shared_ptr<NOlap::NResourceBroker::NSubscribe::TSubscriberCounters>& counters)
             : StoragesManager(storagesManager)
-            , TaskSubscription("CS::NORMALIZER", counters) {}
+            , TaskSubscription("CS:NORMALIZER", counters) {}
 
         const NOlap::NResourceBroker::NSubscribe::TTaskContext& GetTaskSubscription() const {
             return TaskSubscription;

ydb/core/tx/columnshard/splitter/batch_slice.h

@@ -73,11 +73,7 @@ class TDefaultSchemaDetails: public ISchemaDetailInfo {
     }
 
     virtual std::optional<TColumnSerializationStat> GetColumnSerializationStats(const ui32 columnId) const override {
-        auto stats = Stats->GetColumnInfo(columnId);
-        if (stats && stats->GetRecordsCount() != 0) {
-            return stats;
-        }
-        return std::nullopt;
+        return Stats->GetColumnInfo(columnId);
     }
     virtual std::optional<TBatchSerializationStat> GetBatchSerializationStats(const std::shared_ptr<arrow::RecordBatch>& rb) const override {
         return Stats->GetStatsForRecordBatch(rb);