Use Variable::binding_needs_init() to determine hole initialization

test/cctest/interpreter/bytecode_expectations/NewTarget.golden

 #
 # Autogenerated by generate-bytecode-expectations.
 #
 
 ---
 pool type: mixed
 execute: yes
 wrap: yes
 
 ---
 snippet: "
   return new.target;
 "
-frame size: 2
+frame size: 1
 parameter count: 1
-bytecode array length: 18
+bytecode array length: 7
 bytecodes: [
                 B(Mov), R(new_target), R(0),
   /*   30 E> */ B(StackCheck),
-  /*   34 S> */ B(Ldar), R(new_target),
-                B(JumpIfNotHole), U8(11),
-                B(LdaConstant), U8(0),
-                B(Star), R(1),
-                B(CallRuntime), U16(Runtime::kThrowReferenceError), R(1), U8(1),
+  /*   34 S> */ B(Ldar), R(0),
   /*   53 S> */ B(Return),
 ]
 constant pool: [
-  InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
 ]
 handlers: [
 ]
 
 ---
 snippet: "
   new.target;
 "
-frame size: 2
+frame size: 1
 parameter count: 1
-bytecode array length: 19
+bytecode array length: 6
 bytecodes: [
                 B(Mov), R(new_target), R(0),
   /*   30 E> */ B(StackCheck),
-  /*   34 S> */ B(Ldar), R(new_target),
-                B(JumpIfNotHole), U8(11),
-                B(LdaConstant), U8(0),
-                B(Star), R(1),
-                B(CallRuntime), U16(Runtime::kThrowReferenceError), R(1), U8(1),
-                B(LdaUndefined),
+  /*   34 S> */ B(LdaUndefined),
   /*   46 S> */ B(Return),
 ]
 constant pool: [
-  InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
 ]
 handlers: [
 ]