[Interpreter] Refactor bytecode generator test suite.

test/cctest/interpreter/bytecode_expectations/IntegerConstants.golden

Index: test/cctest/interpreter/bytecode_expectations/IntegerConstants.golden
diff --git a/test/cctest/interpreter/bytecode_expectations/IntegerConstants.golden b/test/cctest/interpreter/bytecode_expectations/IntegerConstants.golden
new file mode 100644
index 0000000000000000000000000000000000000000..8b0fdbffba1c29d53992ffed32c13eabc30d3f41
--- /dev/null
+++ b/test/cctest/interpreter/bytecode_expectations/IntegerConstants.golden
@@ -0,0 +1,68 @@
+#
+# Autogenerated by generate-bytecode-expectations
+#
+
+---
+pool type: number
+execute: yes
+wrap: yes
+
+---
+snippet: "
+  return 12345678;
+"
+frame size: 0
+parameter count: 1
+bytecode array length: 4
+bytecodes: [
+  B(StackCheck),
+  B(LdaConstant), U8(0),
+  B(Return),
+]
+constant pool: [
+  12345678,
+]
+handlers: [
+]
+
+---
+snippet: "
+  var a = 1234; return 5678;
+"
+frame size: 1
+parameter count: 1
+bytecode array length: 8
+bytecodes: [
+  B(StackCheck),
+  B(LdaConstant), U8(0),
+  B(Star), R(0),
+  B(LdaConstant), U8(1),
+  B(Return),
+]
+constant pool: [
+  1234,
+  5678,
+]
+handlers: [
+]
+
+---
+snippet: "
+  var a = 1234; return 1234;
+"
+frame size: 1
+parameter count: 1
+bytecode array length: 8
+bytecodes: [
+  B(StackCheck),
+  B(LdaConstant), U8(0),
+  B(Star), R(0),
+  B(LdaConstant), U8(0),
+  B(Return),
+]
+constant pool: [
+  1234,
+]
+handlers: [
+]
+