add_op_extra: elementwise_add, mul (#33491)

Author: Wangzheee

paddle/fluid/operators/compat/elementwise_add.pbtxt

@@ -15,6 +15,14 @@ def {
   }
 }
 extra {
+  attrs {
+    name: "out_threshold"
+    type: FLOAT
+  }
+  attrs {
+    name: "Out0_threshold"
+    type: FLOAT
+  }  
   attrs {
     name: "x_data_format"
     type: STRING

paddle/fluid/operators/compat/mul.pbtxt

@@ -19,6 +19,18 @@ def {
   }
 }
 extra {
+  attrs {
+    name: "Out0_threshold"
+    type: FLOAT
+  } 
+  attrs {
+    name: "bit_length"
+    type: INT
+  }
+  attrs {
+    name: "quantization_type"
+    type: STRING
+  } 
   attrs {
     name: "skip_quant"
     type: BOOLEAN