### 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)

Ref<GDScript> res = GDScriptCache::get_shallow_script(p_preload->resolved_path, err, parser->script_path);
				p_preload->resource = res;
				if (err != OK) {
					push_error(vformat(R"(Could not preload resource script "%s".)", p_preload->resolved_path), p_preload->path);
				}
			} else if (ResourceLoader::get_resource_type(p_preload->resolved_path) == "PackedScene") {
				Error err = OK;
				Ref<PackedScene> res = GDScriptCache::get_packed_scene(p_preload->resolved_path, err, parser->script_path);
				p_preload->resource = res;
				if (err != OK) {
					push_error(vformat(R"(Could not preload resource scene "%s".)", p_preload->resolved_path), p_preload->path);
				}
			} else {
				p_preload->resource = ResourceLoader::load(p_preload->resolved_path);
				if (p_preload->resource.is_null()) {
					push_error(vformat(R"(Could not preload resource file "%s".)", p_preload->resolved_path), p_preload->path);
				}
			}
		}
	}
	p_preload->is_constant = true;
	p_preload->reduced_value = p_preload->resource;
	p_preload->set_datatype(type_from_variant(p_preload->reduced_value, p_preload));
}
void GDScriptAnalyzer::reduce_self(GDScriptParser::SelfNode *p_self) {
	p_self->is_constant = false;
	p_self->set_datatype(type_from_metatype(parser->current_class->get_datatype()));
	mark_lambda_use_self();
}
void GDScriptAnalyzer::reduce_subscript(GDScriptParser::SubscriptNode *p_subscript, bool p_can_be_pseudo_type) {