### Godot version

v4.1.2.rc1.official [58f0cae4a] and v4.2.dev5.official [e3e2528ba]

### System information

Godot v4.1.2.rc1 - Windows 10.0.19044 - Vulkan (Compatibility) - NVIDIA GeForce GTX 1650 (NVIDIA; 31.0.15.3742) - AMD Ryzen 5 3550H with Radeon Vega Mobile Gfx (8 Threads)

### Issue description

Clearing one of the values of a typed array in the inspector seems to just unreference value and not set it to `<null>`, so the value becomes `<Object#null>`. Array's find function seems to look for the `<null>` value and doesn't accept `<Object#null>`, even if in GDScript `<Object#null>` == `<null>`. So, when calling array.find(null) in the tool script, the function can't find anything. When the project is restarted or you run it, the values that were equal to `<Object#null>` will become `<null>`.
![image](https://github.com/godotengine/godot/assets/118438257/208dbf2c-19ea-4d97-9e46-646662cb5122)

### Steps to reproduce

1. Export a typed array of Resource or any of the types that inherit from it;
2. Set one of the values of a typed array to anything;
3. Clear the value;
4. Use array.find(null) in any of the tool scripts.

### Minimal reproduction project

[ArrayBug.zip](https://github.com/godotengine/godot/files/12789530/ArrayBug.zip)
if (is_read_only()) {
		return;
	}
	if (reorder_from_index != reorder_to_index) {
		
		Variant array = object->get_array().duplicate();
		Variant value_to_move = array.get(reorder_from_index);
		array.call("remove_at", reorder_from_index);
		array.call("insert", reorder_to_index, value_to_move);
		emit_changed(get_edited_property(), array, "", false);
		update_property();
	}
	reorder_from_index = -1;
	reorder_to_index = -1;
	reorder_mouse_y_delta = 0.0f;
	Input::get_singleton()->set_mouse_mode(Input::MOUSE_MODE_VISIBLE);
	ERR_FAIL_NULL(reorder_selected_button);
	reorder_selected_button->warp_mouse(reorder_selected_button->get_size() / 2.0f);
	reorder_selected_element_hbox = nullptr;
	reorder_selected_button = nullptr;
}
void EditorPropertyArray::_bind_methods() {