Fix memcheck error in get_dremel_data (#11903)

Fixes logic that applies offsets to nested column children to not write past the end of the offsets vector.

This error was found by the nightly builds and could be recreated using
```
compute-sanitizer --tool memcheck gtests/PARQUET_TEST --gtest_filter=ParquetReaderTest.NestedByteArray --rmm_mode=cuda
```

Authors:
  - David Wendt (https://github.com/davidwendt)

Approvers:
  - Karthikeyan (https://github.com/karthikeyann)
  - Vukasin Milovanovic (https://github.com/vuule)
  - Tobias Ribizel (https://github.com/upsj)

URL: #11903

cpp/src/lists/dremel.cu

@@ -225,6 +225,7 @@ dremel_data get_dremel_data(column_view h_col,
   cudf::detail::device_single_thread(
     [offset_at_level  = d_column_offsets.data(),
      end_idx_at_level = d_column_ends.data(),
+     level_max        = d_column_offsets.size(),
      col              = *d_col] __device__() {
       auto curr_col           = col;
       size_type off           = curr_col.offset();
@@ -239,9 +240,11 @@ dremel_data get_dremel_data(column_view h_col,
         if (curr_col.type().id() == type_id::LIST) {
           off = curr_col.child(lists_column_view::offsets_column_index).element<size_type>(off);
           end = curr_col.child(lists_column_view::offsets_column_index).element<size_type>(end);
-          offset_at_level[level]  = off;
-          end_idx_at_level[level] = end;
-          ++level;
+          if (level < level_max) {
+            offset_at_level[level]  = off;
+            end_idx_at_level[level] = end;
+            ++level;
+          }
           curr_col = curr_col.child(lists_column_view::child_column_index);
         } else {
           curr_col = curr_col.child(0);