add AsExtra for grid_sampler_op (#35339)

Author: LielinJiang

paddle/fluid/operators/grid_sampler_op.cc

@@ -100,7 +100,8 @@ class GridSampleOpMaker : public framework::OpProtoAndCheckerMaker {
     AddAttr<bool>(
         "use_cudnn",
         "(bool, default true) Only used in cudnn kernel, need install cudnn")
-        .SetDefault(true);
+        .SetDefault(true)
+        .AsExtra();
 
     AddAttr<bool>(
         "align_corners",