test: add test case for timestamp

Author: zhf999

src/paimon/common/utils/arrow/arrow_utils_test.cpp

@@ -459,6 +459,12 @@ std::vector<NormalizeCase> NormalizeCases() {
         {arrow::int64(), "[0, 1, null, 3, 4, 5, null, 7, 8, 9]", {{{}, 1}}},
         {arrow::float64(), "[0.5, 1.5, null, 3.5, 4.5, 5.5, null, 7.5, 8.5, 9.5]", {{{}, 1}}},
         {arrow::date32(), "[0, 1, null, 3, 4, 5, null, 7, 8, 9]", {{{}, 1}}},
+        {arrow::timestamp(arrow::TimeUnit::MICRO),
+         "[0, 1, null, 3, 4, 5, null, 7, 8, 9]",
+         {{{}, 1}}},
+        {arrow::timestamp(arrow::TimeUnit::MILLI, "UTC"),
+         "[0, 1, null, 3, 4, 5, null, 7, 8, 9]",
+         {{{}, 1}}},
         {arrow::decimal128(10, 2),
          R"(["1.23", null, "3.45", "6.78", "0.01", null, "9.99", "8.88", "7.77", "6.66"])",
          {{{}, 1}}},