apacheGH-39363: [C++] Use Cast() instead of CastTo() for Parquet (apa…

…che#39364)

### Rationale for this change

Remove legacy code

### What changes are included in this PR?

Replace the legacy scalar CastTo implementation for Parquet.

### Are these changes tested?

Yes. It is passed by existing all test cases for Parquet.

### Are there any user-facing changes?

Maybe, Yes. 

There is a dependency on the Parquet schema that the user handles. There may be a problem if the user has to deal with a type for which Casting is not implemented. However, in this case, it should be treated as a new issue with an implementation that improves the `Cast` compute kernel.

* Closes: apache#39363

Authored-by: Hyunseok Seo <hsseo0501@gmail.com>
Signed-off-by: mwish <maplewish117@gmail.com>

cpp/src/arrow/dataset/file_parquet.cc

@@ -24,6 +24,7 @@
 #include <utility>
 #include <vector>
 
+#include "arrow/compute/cast.h"
 #include "arrow/compute/exec.h"
 #include "arrow/dataset/dataset_internal.h"
 #include "arrow/dataset/parquet_encryption_config.h"
@@ -58,6 +59,8 @@ using parquet::arrow::SchemaField;
 using parquet::arrow::SchemaManifest;
 using parquet::arrow::StatisticsAsScalars;
 
+using compute::Cast;
+
 namespace {
 
 parquet::ReaderProperties MakeReaderProperties(
@@ -370,12 +373,12 @@ std::optional<compute::Expression> ParquetFileFragment::EvaluateStatisticsAsExpr
     return std::nullopt;
   }
 
-  auto maybe_min = min->CastTo(field.type());
-  auto maybe_max = max->CastTo(field.type());
+  auto maybe_min = Cast(min, field.type());
+  auto maybe_max = Cast(max, field.type());
 
   if (maybe_min.ok() && maybe_max.ok()) {
-    min = maybe_min.MoveValueUnsafe();
-    max = maybe_max.MoveValueUnsafe();
+    min = maybe_min.MoveValueUnsafe().scalar();
+    max = maybe_max.MoveValueUnsafe().scalar();
 
     if (min->Equals(*max)) {
       auto single_value = compute::equal(field_expr, compute::literal(std::move(min)));