src: refactor Reallocate since it introduced in upstream v8

PR-URL: #33402
Reviewed-By: Zeyu Yang <himself65@outlook.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

src/node_internals.h

@@ -112,7 +112,7 @@ class NodeArrayBufferAllocator : public ArrayBufferAllocator {
   void* Allocate(size_t size) override;  // Defined in src/node.cc
   void* AllocateUninitialized(size_t size) override;
   void Free(void* data, size_t size) override;
-  virtual void* Reallocate(void* data, size_t old_size, size_t size);
+  void* Reallocate(void* data, size_t old_size, size_t size) override;
   virtual void RegisterPointer(void* data, size_t size) {
     total_mem_usage_.fetch_add(size, std::memory_order_relaxed);
   }