COMP: Place #define _SILENCE_..._DEPRECATION_WARNING before #include

Moved each `_SILENCE_NONFLOATING_COMPLEX_DEPRECATION_WARNING` macro definition
upward, placing it before the very first `#include` statement.

Fixes Visual C++ 2022 warnings like:

> warning C4996: 'std::complex<char>::complex': warning STL4037: The effect of instantiating the template std::complex for any type other than float, double, or long double is unspecified. You can define _SILENCE_NONFLOATING_COMPLEX_DEPRECATION_WARNING to suppress this warning.

Follow-up to pull request #3897
commit 3a9c762
"COMP: Supress warning in MSVC for non-float complex"

Author: N-Dekker

Modules/Core/Common/src/itkNumericTraits.cxx

@@ -15,6 +15,13 @@
  *  limitations under the License.
  *
  *=========================================================================*/
+
+#if !defined(ITK_LEGACY_REMOVE)
+// Suppress MSVC warnings from VS2022, saying: "warning C4996: 'std::complex<T>::complex': warning STL4037: The effect
+// of instantiating the template std::complex for any type other than float, double, or long double is unspecified."
+#  define _SILENCE_NONFLOATING_COMPLEX_DEPRECATION_WARNING
+#endif
+
 #include "itkNumericTraits.h"
 
 namespace itk
@@ -72,8 +79,6 @@ constexpr long double NumericTraits<long double>::Zero;
 constexpr long double NumericTraits<long double>::One;
 
 #if !defined(ITK_LEGACY_REMOVE)
-// Supress MSVC warnings
-#  define _SILENCE_NONFLOATING_COMPLEX_DEPRECATION_WARNING
 template <>
 const std::complex<char> NumericTraits<std::complex<char>>::Zero = std::complex<char>(0, 0);
 template <>

Modules/Core/Common/test/itkMathTest.cxx

@@ -16,6 +16,12 @@
  *
  *=========================================================================*/
 
+#if !defined(ITK_LEGACY_REMOVE)
+// Suppress MSVC warnings from VS2022, saying: "warning C4996: 'std::complex<T>::complex': warning STL4037: The effect
+// of instantiating the template std::complex for any type other than float, double, or long double is unspecified."
+#  define _SILENCE_NONFLOATING_COMPLEX_DEPRECATION_WARNING
+#endif
+
 #include "itkMath.h"
 #include "itkIntTypes.h"
 #include "itkStdStreamStateSave.h"
@@ -25,11 +31,6 @@
 #include <limits>
 #include <type_traits> // For is_same.
 
-#if !defined(ITK_LEGACY_REMOVE)
-// Supress MSVC warnings
-#  define _SILENCE_NONFLOATING_COMPLEX_DEPRECATION_WARNING
-#endif
-
 constexpr auto maxUnsignedValue = std::numeric_limits<uintmax_t>::max();
 
 using itk::Math::UnsignedPower;

Modules/Core/Common/test/itkNumericTraitsTest.cxx

@@ -16,6 +16,12 @@
  *
  *=========================================================================*/
 
+#if !defined(ITK_LEGACY_REMOVE)
+// Suppress MSVC warnings from VS2022, saying: "warning C4996: 'std::complex<T>::complex': warning STL4037: The effect
+// of instantiating the template std::complex for any type other than float, double, or long double is unspecified."
+#  define _SILENCE_NONFLOATING_COMPLEX_DEPRECATION_WARNING
+#endif
+
 #include <iostream>
 #include <cstddef>
 
@@ -36,11 +42,6 @@
 #include "itkNumericTraitsVariableLengthVectorPixel.h"
 #include "itkTestingMacros.h"
 
-#if !defined(ITK_LEGACY_REMOVE)
-// Supress MSVC warnings
-#  define _SILENCE_NONFLOATING_COMPLEX_DEPRECATION_WARNING
-#endif
-
 namespace
 {