Add unscaled values to decimal operators addition benchmark

Addition benchmark relied only on values that needed rescaling,
which is a multiplication by a power of 10.
Benchmarking unscaled values makes addition benchmark more synthetic.

presto-main/src/test/java/io/prestosql/type/BenchmarkDecimalOperators.java

@@ -210,7 +210,10 @@ public static class AdditionBenchmarkState
                 "s1 + s2 + s3 + s4",
                 "l1 + l2",
                 "l1 + l2 + l3 + l4",
-                "s2 + l3 + l1 + s4"})
+                "s2 + l3 + l1 + s4",
+                "lz1 + lz2",
+                "lz1 + lz2 + lz3 + lz4",
+                "s2 + lz3 + lz1 + s4"})
         private String expression = "d1 + d2";
 
         @Setup
@@ -231,6 +234,11 @@ public void setup()
             addSymbol("l3", createDecimalType(20, 6));
             addSymbol("l4", createDecimalType(25, 8));
 
+            addSymbol("lz1", createDecimalType(35, 0));
+            addSymbol("lz2", createDecimalType(25, 0));
+            addSymbol("lz3", createDecimalType(20, 0));
+            addSymbol("lz4", createDecimalType(25, 0));
+
             generateRandomInputPage();
             generateProcessor(expression);
         }