ams: prefer construct_at/destroy_at over placement new/explicit destructor

libraries/libmesosphere/include/mesosphere/kern_k_slab_heap.hpp

@@ -216,7 +216,7 @@ namespace ams::kern {
             T *Allocate() {
                 T *obj = reinterpret_cast<T *>(this->AllocateImpl());
                 if (AMS_LIKELY(obj != nullptr)) {
-                    new (obj) T();
+                    std::construct_at(obj);
                 }
                 return obj;
             }