GH-45545: [C++][Parquet] Add missing includes (#45554)

### Rationale for this change

This fixed a compile error under Windows and MacOS when attempting to package this library as a Conan package: conan-io/conan-center-index#26623

### What changes are included in this PR?

It adds 2 missing headers from the STL, array and vector, which cause resulting compiler errors.

### Are these changes tested?

They are tested and passing for the Conan package of these libraries here: conan-io/conan-center-index#26623

### Are there any user-facing changes?

No, only changes within a source file.

* GitHub Issue: #45545

Authored-by: Antony Peacock <[email protected]>
Signed-off-by: Bryce Mecum <[email protected]>

Author: Twon

cpp/src/parquet/size_statistics.cc

@@ -18,9 +18,11 @@
 #include "parquet/size_statistics.h"
 
 #include <algorithm>
+#include <array>
 #include <numeric>
 #include <ostream>
 #include <string_view>
+#include <vector>
 
 #include "arrow/util/logging.h"
 #include "parquet/exception.h"