ipc: Allow all trivially copyable objects to be passed directly into WriteBuffer

With the support of C++20, we can use concepts to deduce if a type is an STL container or not.

src/core/hle/service/bcat/module.cpp

@@ -112,7 +112,7 @@ private:
     void GetImpl(Kernel::HLERequestContext& ctx) {
         LOG_DEBUG(Service_BCAT, "called");
 
-        ctx.WriteBuffer(&impl, sizeof(DeliveryCacheProgressImpl));
+        ctx.WriteBuffer(impl);
 
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);