### Godot version

9f12e7b52d944

### System information

arch linux

### Issue description

Attempting to edit from the editor a typed array exported from a tool script fails, any value is immediately reset, setters are never called.

### Steps to reproduce

Create a script such as follows and try to add and then change items of the array in the inspector.


```gdscript
@tool
extends Node

@export var x: Array[String]
```

### Minimal reproduction project

n/a
if (base_scene_idx >= 0) {
		Ref<PackedScene> ps = variants[base_scene_idx];
		if (ps.is_valid()) {
			return ps->get_state();
		}
	}
	return Ref<SceneState>();
}
void SceneState::update_instance_resource(String p_path, Ref<PackedScene> p_packed_scene) {
	ERR_FAIL_COND(p_packed_scene.is_null());
	for (const NodeData &nd : nodes) {
		if (nd.instance >= 0) {
			if (!(nd.instance & FLAG_INSTANCE_IS_PLACEHOLDER)) {
				int instance_id = nd.instance & FLAG_MASK;
				Ref<PackedScene> original_packed_scene = variants[instance_id];
				if (original_packed_scene.is_valid()) {
					if (original_packed_scene->get_path() == p_path) {
						variants.remove_at(instance_id);
						variants.insert(instance_id, p_packed_scene);
					}
				}
			}
		}
	}
}
int SceneState::find_node_by_path(const NodePath &p_node) const {