### 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 (items[i].icon_transposed) {
						Size2 size_tmp = draw_rect.size;
						draw_rect.size.x = size_tmp.y;
						draw_rect.size.y = size_tmp.x;
					}
					Rect2 region = (items[i].icon_region.size.x == 0 || items[i].icon_region.size.y == 0) ? Rect2(Vector2(), items[i].icon->get_size()) : Rect2(items[i].icon_region);
					if (rtl) {
						draw_rect.position.x = size.width - draw_rect.position.x - draw_rect.size.x;
					}
					draw_texture_rect_region(items[i].icon, draw_rect, region, icon_modulate, items[i].icon_transposed);
				}
				if (items[i].tag_icon.is_valid()) {
					Point2 draw_pos = items[i].rect_cache.position;
					if (rtl) {
						draw_pos.x = size.width - draw_pos.x - items[i].tag_icon->get_width();
					}
					draw_texture(items[i].tag_icon, draw_pos + base_ofs);
				}
				if (!items[i].text.is_empty()) {
					int max_len = -1;
					Vector2 size2 = items[i].text_buf->get_size();
					if (fixed_column_width) {
						max_len = fixed_column_width;
					} else if (same_column_width) {
						max_len = items[i].rect_cache.size.x;
					} else {
						max_len = size2.x;
					}
					Color txt_modulate;