### 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)

if (scroll_bar->is_visible()) {
				width -= scroll_bar_minwidth;
			}
			draw_style_box(theme_cache.panel_style, Rect2(Point2(), size));
			Ref<StyleBox> sbsel;
			Ref<StyleBox> cursor;
			if (has_focus()) {
				sbsel = theme_cache.selected_focus_style;
				cursor = theme_cache.cursor_focus_style;
			} else {
				sbsel = theme_cache.selected_style;
				cursor = theme_cache.cursor_style;
			}
			bool rtl = is_layout_rtl();
			if (has_focus()) {
				RenderingServer::get_singleton()->canvas_item_add_clip_ignore(get_canvas_item(), true);
				draw_style_box(theme_cache.focus_style, Rect2(Point2(), size));
				RenderingServer::get_singleton()->canvas_item_add_clip_ignore(get_canvas_item(), false);
			}
			
			if (ensure_selected_visible && current >= 0 && current < items.size()) {
				Rect2 r = items[current].rect_cache;
				int from = scroll_bar->get_value();
				int to = from + scroll_bar->get_page();
				if (r.position.y < from) {
					scroll_bar->set_value(r.position.y);
				} else if (r.position.y + r.size.y > to) {
					scroll_bar->set_value(r.position.y + r.size.y - (to - from));
				}
			}