Fix T93526: Missing tooltip for attribute search button

For the attribute search button, the tooltip was missing
if the input socket type has attribute toggle activated.

Differential Revision: https://developer.blender.org/D14142

source/blender/modifiers/intern/MOD_nodes.cc

@@ -1362,7 +1362,7 @@ static void add_attribute_search_button(const bContext &C,
                                  0.0f,
                                  0.0f,
                                  0.0f,
-                                 "");
+                                 socket.description);
 
   const Object *object = ED_object_context(&C);
   BLI_assert(object != nullptr);