### 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)
hbox->add_child(remove_btn);
			}
			prop->update_property();
		}
		if (reorder_to_index % page_length > 0) {
			property_vbox->move_child(property_vbox->get_child(0), reorder_to_index % page_length);
		}
		updating = false;
	} else {
		if (container) {
			set_bottom_editor(nullptr);
			memdelete(container);
			button_add_item = nullptr;
			container = nullptr;
		}
	}
}
void EditorPropertyArray::_remove_pressed(int p_index) {
	Variant array = object->get_array().duplicate();
	array.call("remove_at", p_index);
	emit_changed(get_edited_property(), array, "", false);
	update_property();
}
void EditorPropertyArray::_button_draw() {
	if (dropping) {
		Color color = get_theme_color(SNAME("accent_color"), EditorStringName(Editor));
		edit->draw_rect(Rect2(Point2(), edit->get_size()), color, false);
	}
}
bool EditorPropertyArray::_is_drop_valid(const Dictionary &p_drag_data) const {