IOFile: Require trivially copyable types

Require ReadArray and WriteArray to be called with a trivially copyable
type.

ReadArray and WriteArray call std::fread and std::fwrite respectively.
These functions trigger undefined behavior when the objects are not
trivially copyable, so this adds that requirement to the callers.

Source/Core/Common/IOFile.h

@@ -54,6 +54,7 @@ public:
   IOFile Duplicate(const char openmode[]) const;
 
   template <typename T>
+  requires(std::is_trivially_copyable_v<T>)
   bool ReadArray(T* elements, size_t count, size_t* num_read = nullptr)
   {
     size_t read_count = 0;
@@ -67,6 +68,7 @@ public:
   }
 
   template <typename T>
+  requires(std::is_trivially_copyable_v<T>)
   bool WriteArray(const T* elements, size_t count)
   {
     if (!IsOpen() || count != std::fwrite(elements, sizeof(T), count, m_file))