### 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
for (int i = 0; i < 9; i++) {
		spin[i]->set_read_only(p_read_only);
	}
}
void EditorPropertyBasis::_value_changed(double val, const String &p_name) {
	if (setting) {
		return;
	}
	Basis p;
	p[0][0] = spin[0]->get_value();
	p[0][1] = spin[1]->get_value();
	p[0][2] = spin[2]->get_value();
	p[1][0] = spin[3]->get_value();
	p[1][1] = spin[4]->get_value();
	p[1][2] = spin[5]->get_value();
	p[2][0] = spin[6]->get_value();
	p[2][1] = spin[7]->get_value();
	p[2][2] = spin[8]->get_value();
	emit_changed(get_edited_property(), p, p_name);
}
void EditorPropertyBasis::update_property() {