[fix](partial update) fix a mem leak issue (apache#37706)

we should avoid to use raw pointer

be/src/olap/tablet.cpp

@@ -3113,23 +3113,21 @@ void Tablet::sort_block(vectorized::Block& in_block, vectorized::Block& output_b
     vectorized::MutableBlock mutable_output_block =
             vectorized::MutableBlock::build_mutable_block(&output_block);
 
-    std::vector<RowInBlock*> _row_in_blocks;
-    _row_in_blocks.reserve(in_block.rows());
-
     std::unique_ptr<Schema> schema(new Schema(_schema));
     std::shared_ptr<RowInBlockComparator> vec_row_comparator =
             std::make_shared<RowInBlockComparator>(schema.get());
     vec_row_comparator->set_block(&mutable_input_block);
 
-    std::vector<RowInBlock*> row_in_blocks;
+    std::vector<std::unique_ptr<RowInBlock>> row_in_blocks;
     DCHECK(in_block.rows() <= std::numeric_limits<int>::max());
     row_in_blocks.reserve(in_block.rows());
     for (size_t i = 0; i < in_block.rows(); ++i) {
-        row_in_blocks.emplace_back(new RowInBlock {i});
+        row_in_blocks.emplace_back(std::make_unique<RowInBlock>(i));
     }
     std::sort(row_in_blocks.begin(), row_in_blocks.end(),
-              [&](const RowInBlock* l, const RowInBlock* r) -> bool {
-                  auto value = (*vec_row_comparator)(l, r);
+              [&](const std::unique_ptr<RowInBlock>& l,
+                  const std::unique_ptr<RowInBlock>& r) -> bool {
+                  auto value = (*vec_row_comparator)(l.get(), r.get());
                   DCHECK(value != 0) << "value equel when sort block, l_pos: " << l->_row_pos
                                      << " r_pos: " << r->_row_pos;
                   return value < 0;