### 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)

if (base_type.kind != GDScriptParser::DataType::SCRIPT && base_type.kind != GDScriptParser::DataType::CLASS) { 
			push_error("Cannot assign a new value to a constant.", p_assignment->assignee);
			return;
		}
	} else if (assignee_type.is_read_only) {
		push_error("Cannot assign a new value to a read-only property.", p_assignment->assignee);
		return;
	} else if (p_assignment->assignee->type == GDScriptParser::Node::SUBSCRIPT) {
		GDScriptParser::SubscriptNode *sub = static_cast<GDScriptParser::SubscriptNode *>(p_assignment->assignee);
		while (sub) {
			const GDScriptParser::DataType &base_type = sub->base->datatype;
			if (base_type.is_hard_type() && base_type.is_read_only) {
				if (base_type.kind == GDScriptParser::DataType::BUILTIN && !Variant::is_type_shared(base_type.builtin_type)) {
					push_error("Cannot assign a new value to a read-only property.", p_assignment->assignee);
					return;
				}
			} else {
				break;
			}
			if (sub->base->type == GDScriptParser::Node::SUBSCRIPT) {
				sub = static_cast<GDScriptParser::SubscriptNode *>(sub->base);
			} else {
				sub = nullptr;
			}
		}
	}
	
	if (p_assignment->assigned_value->type == GDScriptParser::Node::ARRAY && assignee_type.has_container_element_type()) {
		update_array_literal_element_type(static_cast<GDScriptParser::ArrayNode *>(p_assignment->assigned_value), assignee_type.get_container_element_type());
	}