### 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
GDCLASS(EditorPropertyFlags, EditorProperty);
	VBoxContainer *vbox = nullptr;
	Vector<CheckBox *> flags;
	Vector<uint32_t> flag_values;
	void _flag_toggled(int p_index);
protected:
	virtual void _set_read_only(bool p_read_only) override;
	static void _bind_methods();
public:
	void setup(const Vector<String> &p_options);
	virtual void update_property() override;
	EditorPropertyFlags();
};
class EditorPropertyLayersGrid : public Control {
	GDCLASS(EditorPropertyLayersGrid, Control);
private:
	Vector<Rect2> flag_rects;
	Rect2 expand_rect;
	bool expand_hovered = false;
	bool expanded = false;
	int expansion_rows = 0;
	int hovered_index = -1;
	bool read_only = false;