### 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 (!is_inside_tree()) {
		return;
	}
	updating_theme = true;
	if (sub_inspector != nullptr) {
		int count_subinspectors = 0;
		Node *n = get_parent();
		while (n) {
			EditorInspector *ei = Object::cast_to<EditorInspector>(n);
			if (ei && ei->is_sub_inspector()) {
				count_subinspectors++;
			}
			n = n->get_parent();
		}
		count_subinspectors = MIN(15, count_subinspectors);
		add_theme_color_override("property_color", get_theme_color(SNAME("sub_inspector_property_color"), SNAME("Editor")));
		add_theme_style_override("bg_selected", get_theme_stylebox("sub_inspector_property_bg" + itos(count_subinspectors), SNAME("Editor")));
		add_theme_style_override("bg", get_theme_stylebox("sub_inspector_property_bg" + itos(count_subinspectors), SNAME("Editor")));
		add_theme_constant_override("v_separation", 0);
	} else {
		add_theme_color_override("property_color", get_theme_color(SNAME("property_color"), SNAME("EditorProperty")));
		add_theme_style_override("bg_selected", get_theme_stylebox(SNAME("bg_selected"), SNAME("EditorProperty")));
		add_theme_style_override("bg", get_theme_stylebox(SNAME("bg"), SNAME("EditorProperty")));
		add_theme_constant_override("v_separation", get_theme_constant(SNAME("v_separation"), SNAME("EditorProperty")));
	}
	updating_theme = false;
	queue_redraw();
}
void EditorPropertyResource::_update_preferred_shader() {