### Godot version

ef025711a

### System information

ArchLinux x11

### Issue description

Accessing a scene unique node like this:
```gdscript
class_name Class extends Node
static func get_label() -> Label:
	return %label
```
and then accessing that class later:
```gdscript
func _ready() -> void:
	Main.get_label().text = "hello world"
```
causes a strange error when in the editor, and a normal error when run directly.
![image](https://user-images.githubusercontent.com/70787919/229785642-6aad4e31-6bd9-4eb5-bee4-7445b48a99bb.png)
```c++
ERROR: Node not found: "%label" (relative to "/root/main").
   at: get_node (scene/main/node.cpp:1364)
```
Instead of returning null.
As opposed to when using `get_node`:
```

SCRIPT ERROR: Cannot call method 'get_node' on a null value.
          at: get_label (res://main.gd:5)
SCRIPT ERROR: Invalid set index 'text' (on base: 'Nil') with value of type 'String'.
          at: _ready (res://control.gd:4)
```

### Steps to reproduce

Run mrp or follow outlined steps

### Minimal reproduction project

[bug.zip](https://github.com/godotengine/godot/files/11148287/bug.zip)

GDScriptParser::DataType result;
	result.type_source = GDScriptParser::DataType::ANNOTATED_EXPLICIT;
	result.kind = GDScriptParser::DataType::BUILTIN;
	result.builtin_type = Variant::BOOL;
	p_type_test->set_datatype(result);
	if (!p_type_test->operand || !p_type_test->test_type) {
		return;
	}
	reduce_expression(p_type_test->operand);
	GDScriptParser::DataType operand_type = p_type_test->operand->get_datatype();
	GDScriptParser::DataType test_type = type_from_metatype(resolve_datatype(p_type_test->test_type));
	p_type_test->test_datatype = test_type;
	if (!operand_type.is_set() || !test_type.is_set()) {
		return;
	}
	if (p_type_test->operand->is_constant) {
		p_type_test->is_constant = true;
		p_type_test->reduced_value = false;
		if (!is_type_compatible(test_type, operand_type)) {
			push_error(vformat(R"(Expression is of type "%s" so it can't be of type "%s".)", operand_type.to_string(), test_type.to_string()), p_type_test->operand);
		} else if (is_type_compatible(test_type, type_from_variant(p_type_test->operand->reduced_value, p_type_test->operand))) {
			p_type_test->reduced_value = test_type.builtin_type != Variant::OBJECT || !p_type_test->operand->reduced_value.is_null();
		}
		return;
	}
	if (!is_type_compatible(test_type, operand_type) && !is_type_compatible(operand_type, test_type)) {
		if (operand_type.is_hard_type()) {
			push_error(vformat(R"(Expression is of type "%s" so it can't be of type "%s".)", operand_type.to_string(), test_type.to_string()), p_type_test->operand);
		} else {
			downgrade_node_type_source(p_type_test->operand);