### 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("is_item_disabled", "idx"), &ItemList::is_item_disabled);
	ClassDB::bind_method(D_METHOD("set_item_metadata", "idx", "metadata"), &ItemList::set_item_metadata);
	ClassDB::bind_method(D_METHOD("get_item_metadata", "idx"), &ItemList::get_item_metadata);
	ClassDB::bind_method(D_METHOD("set_item_custom_bg_color", "idx", "custom_bg_color"), &ItemList::set_item_custom_bg_color);
	ClassDB::bind_method(D_METHOD("get_item_custom_bg_color", "idx"), &ItemList::get_item_custom_bg_color);
	ClassDB::bind_method(D_METHOD("set_item_custom_fg_color", "idx", "custom_fg_color"), &ItemList::set_item_custom_fg_color);
	ClassDB::bind_method(D_METHOD("get_item_custom_fg_color", "idx"), &ItemList::get_item_custom_fg_color);
	ClassDB::bind_method(D_METHOD("get_item_rect", "idx", "expand"), &ItemList::get_item_rect, DEFVAL(true));
	ClassDB::bind_method(D_METHOD("set_item_tooltip_enabled", "idx", "enable"), &ItemList::set_item_tooltip_enabled);
	ClassDB::bind_method(D_METHOD("is_item_tooltip_enabled", "idx"), &ItemList::is_item_tooltip_enabled);
	ClassDB::bind_method(D_METHOD("set_item_tooltip", "idx", "tooltip"), &ItemList::set_item_tooltip);
	ClassDB::bind_method(D_METHOD("get_item_tooltip", "idx"), &ItemList::get_item_tooltip);
	ClassDB::bind_method(D_METHOD("select", "idx", "single"), &ItemList::select, DEFVAL(true));
	ClassDB::bind_method(D_METHOD("deselect", "idx"), &ItemList::deselect);
	ClassDB::bind_method(D_METHOD("deselect_all"), &ItemList::deselect_all);
	ClassDB::bind_method(D_METHOD("is_selected", "idx"), &ItemList::is_selected);
	ClassDB::bind_method(D_METHOD("get_selected_items"), &ItemList::get_selected_items);
	ClassDB::bind_method(D_METHOD("move_item", "from_idx", "to_idx"), &ItemList::move_item);
	ClassDB::bind_method(D_METHOD("set_item_count", "count"), &ItemList::set_item_count);
	ClassDB::bind_method(D_METHOD("get_item_count"), &ItemList::get_item_count);
	ClassDB::bind_method(D_METHOD("remove_item", "idx"), &ItemList::remove_item);
	ClassDB::bind_method(D_METHOD("clear"), &ItemList::clear);
	ClassDB::bind_method(D_METHOD("sort_items_by_text"), &ItemList::sort_items_by_text);
	ClassDB::bind_method(D_METHOD("set_fixed_column_width", "width"), &ItemList::set_fixed_column_width);
	ClassDB::bind_method(D_METHOD("get_fixed_column_width"), &ItemList::get_fixed_column_width);
	ClassDB::bind_method(D_METHOD("set_same_column_width", "enable"), &ItemList::set_same_column_width);
	ClassDB::bind_method(D_METHOD("is_same_column_width"), &ItemList::is_same_column_width);
	ClassDB::bind_method(D_METHOD("set_max_text_lines", "lines"), &ItemList::set_max_text_lines);
	ClassDB::bind_method(D_METHOD("get_max_text_lines"), &ItemList::get_max_text_lines);
	ClassDB::bind_method(D_METHOD("set_max_columns", "amount"), &ItemList::set_max_columns);