Do not use new struct type where unnecessary.

test/cctest/interpreter/bytecode_expectations/NewAndSpread.golden

Index: test/cctest/interpreter/bytecode_expectations/NewAndSpread.golden
diff --git a/test/cctest/interpreter/bytecode_expectations/NewAndSpread.golden b/test/cctest/interpreter/bytecode_expectations/NewAndSpread.golden
index e77314533cc589a849f0ebc9a9b7bcf83e27ae61..feeb5c28a131eebbeb10a738d54c99cb2a2aed3b 100644
--- a/test/cctest/interpreter/bytecode_expectations/NewAndSpread.golden
+++ b/test/cctest/interpreter/bytecode_expectations/NewAndSpread.golden
@@ -44,7 +44,7 @@ bytecodes: [
 ]
 constant pool: [
   SHARED_FUNCTION_INFO_TYPE,
-  CONSTANT_ELEMENTS_PAIR_TYPE,
+  TUPLE2_TYPE,
 ]
 handlers: [
 ]
@@ -90,7 +90,7 @@ bytecodes: [
 ]
 constant pool: [
   SHARED_FUNCTION_INFO_TYPE,
-  CONSTANT_ELEMENTS_PAIR_TYPE,
+  TUPLE2_TYPE,
 ]
 handlers: [
 ]
@@ -148,9 +148,9 @@ bytecodes: [
 ]
 constant pool: [
   SHARED_FUNCTION_INFO_TYPE,
-  CONSTANT_ELEMENTS_PAIR_TYPE,
-  CONSTANT_ELEMENTS_PAIR_TYPE,
-  CONSTANT_ELEMENTS_PAIR_TYPE,
+  TUPLE2_TYPE,
+  TUPLE2_TYPE,
+  TUPLE2_TYPE,
 ]
 handlers: [
 ]