### 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)

for (TreeItem *current = root; current; current = current->get_next_visible()) {
		for (int i = 0; i < columns.size(); i++) {
			if (current->get_text(i) == p_find) {
				return current;
			}
		}
	}
	return nullptr;
}
TreeItem *Tree::get_item_with_metadata(const Variant &p_find, int p_column) const {
	if (p_column < 0) {
		for (TreeItem *current = root; current; current = current->get_next_in_tree()) {
			for (int i = 0; i < columns.size(); i++) {
				if (current->get_metadata(i) == p_find) {
					return current;
				}
			}
		}
		return nullptr;
	}
	for (TreeItem *current = root; current; current = current->get_next_in_tree()) {
		if (current->get_metadata(p_column) == p_find) {
			return current;
		}
	}
	return nullptr;
}
void Tree::_do_incr_search(const String &p_add) {