### 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
custom_value_edit->set_text(get_edited_property_value());
	edit_custom_layout->hide();
	default_layout->show();
}
void EditorPropertyTextEnum::update_property() {
	String current_value = get_edited_property_value();
	int default_option = options.find(current_value);
	
	if (loose_mode) {
		custom_value_edit->set_text(current_value);
		option_button->clear();
		
		if (default_option < 0 && !current_value.is_empty()) {
			option_button->add_item(current_value, options.size() + 1001);
			option_button->select(0);
			option_button->add_separator();
		}
		
		option_button->add_item("", options.size() + 1000);
		for (int i = 0; i < options.size(); i++) {
			option_button->add_item(options[i], i);
			if (options[i] == current_value) {
				option_button->select(option_button->get_item_count() - 1);
			}
		}
	} else {
		option_button->select(default_option);
	}
}
void EditorPropertyTextEnum::setup(const Vector<String> &p_options, bool p_string_name, bool p_loose_mode) {