[Interpreter] Refactor bytecode generator test suite.

test/cctest/interpreter/OuterContextVariables.golden

+#
+# Autogenerated by generate-bytecode-expectations
+#
+
+---
+pool type: mixed
+execute: yes
+wrap: no
+test function name: f
+
+---
+snippet: "
+  function Outer() {  var outerVar = 1;  function Inner(innerArg) {    this.innerFunc = function() { return outerVar * innerArg; }  }  this.getInnerFunc = function() { return new Inner(1).innerFunc; }}var f = new Outer().getInnerFunc();
+  f();
+"
+frame size: 2  # in multiples of sizeof(void*)
+parameter count: 1
+bytecodes: [
+  B(StackCheck),
+  B(Ldar), R(context),
+  B(Star), R(0),
+  B(LdaContextSlot), R(0), U8(1),
+  B(Star), R(0),
+  B(LdaContextSlot), R(0), U8(4),
+  B(Star), R(1),
+  B(LdaContextSlot), R(context), U8(4),
+  B(Mul), R(1),
+  B(Return),
+]
+constant pool: [
+]
+handlers: [
+]
+
+---
+snippet: "
+  function Outer() {  var outerVar = 1;  function Inner(innerArg) {    this.innerFunc = function() { outerVar = innerArg; }  }  this.getInnerFunc = function() { return new Inner(1).innerFunc; }}var f = new Outer().getInnerFunc();
+  f();
+"
+frame size: 2  # in multiples of sizeof(void*)
+parameter count: 1
+bytecodes: [
+  B(StackCheck),
+  B(LdaContextSlot), R(context), U8(4),
+  B(Star), R(0),
+  B(Ldar), R(context),
+  B(Star), R(1),
+  B(LdaContextSlot), R(1), U8(1),
+  B(Star), R(1),
+  B(Ldar), R(0),
+  B(StaContextSlot), R(1), U8(4),
+  B(LdaUndefined),
+  B(Return),
+]
+constant pool: [
+]
+handlers: [
+]
+