### 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 (p_menu == grid->layer_count) {
		ProjectSettingsEditor::get_singleton()->popup_project_settings(true);
		ProjectSettingsEditor::get_singleton()->set_general_page(basename);
	} else {
		if (grid->value & (1 << p_menu)) {
			grid->value &= ~(1 << p_menu);
		} else {
			grid->value |= (1 << p_menu);
		}
		grid->queue_redraw();
		layers->set_item_checked(layers->get_item_index(p_menu), grid->value & (1 << p_menu));
		_grid_changed(grid->value);
	}
}
void EditorPropertyLayers::_refresh_names() {