### 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)

}
	Tree *old_tree = tree;
	_unlink_from_tree();
	_change_tree(p_item->tree);
	if (p_item->next) {
		p_item->next->prev = this;
	}
	parent = p_item->parent;
	prev = p_item;
	next = p_item->next;
	p_item->next = this;
	if (next) {
		parent->children_cache.clear();
	} else {
		
		
		if (!parent->children_cache.is_empty()) {
			parent->children_cache.append(this);
		}
	}
	if (tree && old_tree == tree) {
		tree->queue_redraw();
	}
	validate_cache();
}
void TreeItem::set_selectable(int p_column, bool p_selectable) {
	ERR_FAIL_INDEX(p_column, cells.size());
	cells.write[p_column].selectable = p_selectable;
}
bool TreeItem::is_selectable(int p_column) const {