Remove upload on page fault "optimization" (#16485)

Author: kunga

ydb/core/tx/datashard/build_index/local_kmeans.cpp

@@ -186,12 +186,6 @@ class TLocalKMeansScanBase: public TActor<TLocalKMeansScanBase>, public NTable::
     EScan PageFault() noexcept final
     {
         LOG_T("PageFault " << Debug());
-
-        if (!ReadBuf.IsEmpty() && WriteBuf.IsEmpty()) {
-            ReadBuf.FlushTo(WriteBuf);
-            Upload(false);
-        }
-
         return EScan::Feed;
     }
 

ydb/core/tx/datashard/build_index/prefix_kmeans.cpp

@@ -207,12 +207,6 @@ class TPrefixKMeansScanBase: public TActor<TPrefixKMeansScanBase>, public NTable
     EScan PageFault() final
     {
         LOG_T("PageFault " << Debug());
-
-        UploadInProgress()
-            || TryUpload(LevelBuf, LevelTable, LevelTypes, false)
-            || TryUpload(PostingBuf, PostingTable, PostingTypes, false)
-            || TryUpload(PrefixBuf, PrefixTable, PrefixTypes, false);
-
         return EScan::Feed;
     }
 

ydb/core/tx/datashard/build_index/reshuffle_kmeans.cpp

@@ -161,12 +161,6 @@ class TReshuffleKMeansScanBase: public TActor<TReshuffleKMeansScanBase>, public
     EScan PageFault() noexcept final
     {
         LOG_T("PageFault " << Debug());
-
-        if (!ReadBuf.IsEmpty() && WriteBuf.IsEmpty()) {
-            ReadBuf.FlushTo(WriteBuf);
-            Upload(false);
-        }
-
         return EScan::Feed;
     }