### 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
case LAYER_NAVIGATION_3D: {
			basename = "layer_names/3d_navigation";
			layer_group_size = 4;
			layer_count = 32;
		} break;
		case LAYER_AVOIDANCE: {
			basename = "layer_names/avoidance";
			layer_group_size = 4;
			layer_count = 32;
		} break;
	}
	Vector<String> names;
	Vector<String> tooltips;
	for (int i = 0; i < layer_count; i++) {
		String name;
		if (ProjectSettings::get_singleton()->has_setting(basename + vformat("/layer_%d", i + 1))) {
			name = GLOBAL_GET(basename + vformat("/layer_%d", i + 1));
		}
		if (name.is_empty()) {
			name = vformat(TTR("Layer %d"), i + 1);
		}
		names.push_back(name);
		tooltips.push_back(name + "\n" + vformat(TTR("Bit %d, value %d"), i, 1 << i));
	}
	grid->names = names;
	grid->tooltips = tooltips;
	grid->layer_group_size = layer_group_size;
	grid->layer_count = layer_count;
}
void EditorPropertyLayers::set_layer_name(int p_index, const String &p_name) {