Prefer NativeMemory.AlignedAlloc over Marshal.Alloc*

Source/Engine/Scripting/DotNet/CoreCLR.cpp

@@ -129,12 +129,7 @@ void CoreCLR::RegisterNativeLibrary(const char* moduleName, const char* modulePa
 
 void* CoreCLR::Allocate(int size)
 {
-#if PLATFORM_WINDOWS
-    void* ptr = CoTaskMemAlloc(size);
-#else
-    void* ptr = malloc(size);
-#endif
-
+    void* ptr = Platform::Allocate(size, 16);
 #if COMPILE_WITH_PROFILER
     Platform::OnMemoryAlloc(ptr, size);
 #endif
@@ -146,9 +141,5 @@ void CoreCLR::Free(void* ptr)
 #if COMPILE_WITH_PROFILER
     Platform::OnMemoryFree(ptr);
 #endif
-#if PLATFORM_WINDOWS
-    CoTaskMemFree(ptr);
-#else
-    free(ptr);
-#endif
+    Platform::Free(ptr);
 }