### Godot version

4.0.rc6

### System information

Windows 10

### Issue description

Disabled items of an `ItemList` still trigger `item_selected` and `item_activated` signals when using the mouse. Even though the documentation states that:
> Disabled items cannot be selected and do not trigger activation signals (when double-clicking or pressing Enter).

Visually, they are as expected (grayed out and can't grab focus).

-----
This seems to be a recurring problem as it has happened in Godot 2 (#5683) and Godot 3 (#37277) as well.
According to the comments in #37277, PR #37285 (#60123) is supposed to fix it for Godot 4. But it still seems to be an issue.

The PR suggests using `disabled` for rendering and `selectable` for actual selection. If that's the final verdict on the matter, then the documentation should be updated to reflect this.

### Steps to reproduce

1. Create a simple scene.
2. Add an `ItemList` and add several items to it via the Inspector. Disable one or more items.
3. Attach a script to the item list with the following code:
```gdscript
extends ItemList


func _ready() -> void:
	item_activated.connect(_on_item_activated)
	item_selected.connect(_on_item_selected)


func _on_item_activated(item_index: int) -> void:
	prints("Item Activated:", item_index)


func _on_item_selected(item_index: int) -> void:
	prints("Item Selected:", item_index)
```
4. Run the project and try selecting/activating a disabled item.
5. Check the Output console for results.

### Minimal reproduction project

[ItemList_DisabledItem_Bug.zip](https://github.com/godotengine/godot/files/10844570/ItemList_DisabledItem_Bug.zip)

ClassDB::bind_method(D_METHOD("add_item", "text", "icon", "selectable"), &ItemList::add_item, DEFVAL(Variant()), DEFVAL(true));
	ClassDB::bind_method(D_METHOD("add_icon_item", "icon", "selectable"), &ItemList::add_icon_item, DEFVAL(true));
	ClassDB::bind_method(D_METHOD("set_item_text", "idx", "text"), &ItemList::set_item_text);
	ClassDB::bind_method(D_METHOD("get_item_text", "idx"), &ItemList::get_item_text);
	ClassDB::bind_method(D_METHOD("set_item_icon", "idx", "icon"), &ItemList::set_item_icon);
	ClassDB::bind_method(D_METHOD("get_item_icon", "idx"), &ItemList::get_item_icon);
	ClassDB::bind_method(D_METHOD("set_item_text_direction", "idx", "direction"), &ItemList::set_item_text_direction);
	ClassDB::bind_method(D_METHOD("get_item_text_direction", "idx"), &ItemList::get_item_text_direction);
	ClassDB::bind_method(D_METHOD("set_item_language", "idx", "language"), &ItemList::set_item_language);
	ClassDB::bind_method(D_METHOD("get_item_language", "idx"), &ItemList::get_item_language);
	ClassDB::bind_method(D_METHOD("set_item_icon_transposed", "idx", "transposed"), &ItemList::set_item_icon_transposed);
	ClassDB::bind_method(D_METHOD("is_item_icon_transposed", "idx"), &ItemList::is_item_icon_transposed);
	ClassDB::bind_method(D_METHOD("set_item_icon_region", "idx", "rect"), &ItemList::set_item_icon_region);
	ClassDB::bind_method(D_METHOD("get_item_icon_region", "idx"), &ItemList::get_item_icon_region);
	ClassDB::bind_method(D_METHOD("set_item_icon_modulate", "idx", "modulate"), &ItemList::set_item_icon_modulate);
	ClassDB::bind_method(D_METHOD("get_item_icon_modulate", "idx"), &ItemList::get_item_icon_modulate);
	ClassDB::bind_method(D_METHOD("set_item_selectable", "idx", "selectable"), &ItemList::set_item_selectable);
	ClassDB::bind_method(D_METHOD("is_item_selectable", "idx"), &ItemList::is_item_selectable);
	ClassDB::bind_method(D_METHOD("set_item_disabled", "idx", "disabled"), &ItemList::set_item_disabled);