Scene recognizes @tool only on open

**Godot version:** v4.3.stable.official [77dcf97d8]

**Issue description:**
When adding (or removing) the `@tool`-tag from a script, opened scenes don't detect the change automatically.
Only when closing and reopening a scene, the scene correctly detects the added/removed `@tool`.

**Documentation Page:** [Running code in the editor](https://docs.godotengine.org/en/4.3/tutorials/plugins/running_code_in_the_editor.html)

**Steps:**
1. Create a scene
2. Add the script to the scene
* Add `@tool` to the start of the script
* Add `print("Hello")` to the `_process` function
3. Switch back to the scene -> no 'Hello' appears in the console
4. Close and reopen the scene -> 'Hello' appears in the console

```gdscript
@tool
extends Node2D

func _process(delta: float) -> void:
print("Hello")
```