[flang] Fix all/any scalar unit tests

[mleair]

Summary

I accidentally used int64 instead of int32 in the unit test result check of all/any unit tests. This lead to bad results in the Windows build.
(see also https://reviews.llvm.org/D106820)

[PeteSteinfeld]

All builds, tests, and looks good.

flang/unittests/RuntimeGTest/Reduction.cpp

   Descriptor &scalarResult{statDesc0.descriptor()};
   RTNAME(AllDim)(scalarResult, *array1, /*DIM=*/1, __FILE__, __LINE__);
   EXPECT_EQ(scalarResult.rank(), 0);
-  EXPECT_EQ(*scalarResult.ZeroBasedIndexedElement<std::int64_t>(0), 0);
+  EXPECT_EQ(*scalarResult.ZeroBasedIndexedElement<std::int32_t>(0), 0);
   scalarResult.Destroy();
   RTNAME(AnyDim)(res, *array, /*DIM=*/1, __FILE__, __LINE__);
   EXPECT_EQ(res.rank(), 1);

   // A scalar result occurs when you have a rank 1 array.
   RTNAME(AnyDim)(scalarResult, *array1, /*DIM=*/1, __FILE__, __LINE__);
   EXPECT_EQ(scalarResult.rank(), 0);
-  EXPECT_EQ(*scalarResult.ZeroBasedIndexedElement<std::int64_t>(0), 1);
+  EXPECT_EQ(*scalarResult.ZeroBasedIndexedElement<std::int32_t>(0), 1);
   scalarResult.Destroy();
   RTNAME(ParityDim)(res, *array, /*DIM=*/1, __FILE__, __LINE__);
   EXPECT_EQ(res.rank(), 1);