Fix fsync_after_insert by not closing fd from finalize()

But this may cause troubles, another option will be to split finalize()
into finalize(bool sync) and finalizeImpl()

This was introduced in #8356

src/IO/WriteBufferFromFile.h

@@ -50,11 +50,6 @@ public:
     /// Close file before destruction of object.
     void close();
 
-    void finalize() override
-    {
-        close();
-    }
-
     std::string getFileName() const override
     {
         return file_name;