### Godot version

v4.0.3.stable.official [5222a99f5]
Master [6101240231600c871f5c5473872532c68ea3268c] (confirmed by https://github.com/godotengine/godot/issues/77666#issuecomment-1568952502)

### System information

Window 10

### Issue description

References are not unreferenced at the end of `if` scopes.

### Steps to reproduce

Copy, paste and run the snippet below, check the results:

```gdscript
extends Node


func _ready() -> void:
  var ref := RefCounted.new()
  var ref_count : int

  # OK
  ref_count = ref.get_reference_count()
  print('Expected: 1, Result: %d' % ref_count)

  # OK
  if true:
    var temp := ref
    temp = null

  ref_count = ref.get_reference_count()
  print('Expected: 1, Result: %d' % ref_count)

  # FAIL
  if true:
    var temp := ref

  ref_count = ref.get_reference_count()
  print('Expected: 1, Result: %d' % ref_count)
```

Output example:

```
Expected: 1, Result: 1
Expected: 1, Result: 1
Expected: 1, Result: 2
```

### Minimal reproduction project

N/A
#endif
			break;
		}
	}
	while (!is_annotation && result != nullptr && !annotation_stack.is_empty()) {
		AnnotationNode *last_annotation = annotation_stack.back()->get();
		if (last_annotation->applies_to(AnnotationInfo::STATEMENT)) {
			result->annotations.push_front(last_annotation);
			annotation_stack.pop_back();
		} else {
			push_error(vformat(R"(Annotation "%s" cannot be applied to a statement.)", last_annotation->name));
			clear_unused_annotations();
		}
	}
#ifdef DEBUG_ENABLED
	if (unreachable && result != nullptr) {
		current_suite->has_unreachable_code = true;
		if (current_function) {
			push_warning(result, GDScriptWarning::UNREACHABLE_CODE, current_function->identifier ? current_function->identifier->name : "<anonymous lambda>");
		} else {
			
		}
	}
#endif
	if (panic_mode) {
		synchronize();
	}
	return result;
}
GDScriptParser::AssertNode *GDScriptParser::parse_assert() {