### Godot version

4.2 Stable

### System information

Linux

### Issue description

Calling TreeItem set_text() on a TreeItem that was removed via remove_child() causes debugging to end and the application to close without any error message.

### Steps to reproduce

Run the included example to get the debugger to crash. Comment out "treeItem.remove_child(subTreeItem)" for normal behaviour. 

### Minimal reproduction project

[treeItemCrash.zip](https://github.com/godotengine/godot/files/13534005/treeItemCrash.zip)

return root;
}
TreeItem *Tree::get_last_item() const {
	TreeItem *last = root;
	while (last) {
		if (last->next) {
			last = last->next;
		} else if (last->first_child) {
			last = last->first_child;
		} else {
			break;
		}
	}
	return last;
}
void Tree::item_edited(int p_column, TreeItem *p_item, MouseButton p_custom_mouse_index) {
	edited_item = p_item;
	edited_col = p_column;
	if (p_item != nullptr && p_column >= 0 && p_column < p_item->cells.size()) {
		edited_item->cells.write[p_column].dirty = true;
	}
	emit_signal(SNAME("item_edited"));
	if (p_custom_mouse_index != MouseButton::NONE) {
		emit_signal(SNAME("custom_item_clicked"), p_custom_mouse_index);
	}
}
void Tree::item_changed(int p_column, TreeItem *p_item) {