arrow

GH-15052: [C++][Parquet] Fix DELTA_BINARY_PACKED decoder when reading only one value (#15124)

This patch trying to fix https://github.com/apache/arrow/issues/15052 . The problem is mentioned here: https://github.com/apache/arrow/issues/15052#issuecomment-1367486164

When read 1 value, DeltaBitPackDecoder will not call `InitBlock`, causing it always read `last_value_`.

Seems the problem is introduced in https://github.com/apache/arrow/pull/10627 and https://github.com/amol-/arrow/commit/d982bedcf5e03d44c01949b192da54a8c1e525d8

I will add some test tonight
* Closes: #15052

Lead-authored-by: mwish <maplewish117@gmail.com>
Co-authored-by: Antoine Pitrou <antoine@python.org>
Co-authored-by: mwish <1506118561@qq.com>
Co-authored-by: Rok Mihevc <rok@mihevc.org>
Signed-off-by: Antoine Pitrou <antoine@python.org>