[ignition] desugar async functions/generators/modules in BytecodeGenerator

test/cctest/interpreter/bytecode_expectations/ThisFunction.golden

Index: test/cctest/interpreter/bytecode_expectations/ThisFunction.golden
diff --git a/test/cctest/interpreter/bytecode_expectations/ThisFunction.golden b/test/cctest/interpreter/bytecode_expectations/ThisFunction.golden
index 5d1c7c914384fc5f55953d5e8160f69b9d4c567d..92a02c078cee0f857e942b6e807d15bea782c667 100644
--- a/test/cctest/interpreter/bytecode_expectations/ThisFunction.golden
+++ b/test/cctest/interpreter/bytecode_expectations/ThisFunction.golden
@@ -12,12 +12,11 @@ snippet: "
   f = function f() {};
   f();
 "
-frame size: 1
+frame size: 0
 parameter count: 1
-bytecode array length: 6
+bytecode array length: 3
 bytecodes: [
   /*   21 E> */ B(StackCheck),
-                B(Mov), R(closure), R(0),
                 B(LdaUndefined),
   /*   25 S> */ B(Return),
 ]