### 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)

#ifdef DEBUG_ENABLED
	if (p_assignable->identifier != nullptr && p_assignable->identifier->suite != nullptr && p_assignable->identifier->suite->parent_block != nullptr) {
		if (p_assignable->identifier->suite->parent_block->has_local(p_assignable->identifier->name)) {
			const GDScriptParser::SuiteNode::Local &local = p_assignable->identifier->suite->parent_block->get_local(p_assignable->identifier->name);
			parser->push_warning(p_assignable->identifier, GDScriptWarning::CONFUSABLE_LOCAL_DECLARATION, local.get_name(), p_assignable->identifier->name);
		}
	}
#endif
	GDScriptParser::DataType specified_type;
	bool has_specified_type = p_assignable->datatype_specifier != nullptr;
	if (has_specified_type) {
		specified_type = type_from_metatype(resolve_datatype(p_assignable->datatype_specifier));
		type = specified_type;
	}
	if (p_assignable->initializer != nullptr) {
		reduce_expression(p_assignable->initializer);
		if (p_assignable->initializer->type == GDScriptParser::Node::ARRAY) {
			GDScriptParser::ArrayNode *array = static_cast<GDScriptParser::ArrayNode *>(p_assignable->initializer);
			if (has_specified_type && specified_type.has_container_element_type()) {
				update_array_literal_element_type(array, specified_type.get_container_element_type());
			}
		}
		if (is_constant && !p_assignable->initializer->is_constant) {
			bool is_initializer_value_reduced = false;
			Variant initializer_value = make_expression_reduced_value(p_assignable->initializer, is_initializer_value_reduced);
			if (is_initializer_value_reduced) {
				p_assignable->initializer->is_constant = true;
				p_assignable->initializer->reduced_value = initializer_value;
			} else {
				push_error(vformat(R"(Assigned value for %s "%s" isn't a constant expression.)", p_kind, p_assignable->identifier->name), p_assignable->initializer);