custom op support post hook (#72976)

Author: wanghuancoder

paddle/fluid/eager/custom_operator/custom_operator_node.cc

@@ -373,6 +373,10 @@ RunCustomOpNode::operator()(paddle::small_vector<std::vector<paddle::Tensor>,
     grad_node->SetAttrs(attrs);
   }
 
+  if (HasNodePostHook()) {
+    outs = ApplyNodePostHooks(outs, hooked_grads);
+  }
+
   return outs;
 }
 
@@ -459,6 +463,10 @@ RunCustomOpDoubleGradNode::operator()(
     outs[i] = ctx.OutputsBetween(output_pair.first, output_pair.second);
   }
 
+  if (HasNodePostHook()) {
+    outs = ApplyNodePostHooks(outs, hooked_grads);
+  }
+
   return outs;
 }
 }  // namespace egr