### 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)

ERR_FAIL_INDEX_V(p_column, cells.size(), false);
	ERR_FAIL_INDEX_V(p_index, cells[p_column].buttons.size(), false);
	return cells[p_column].buttons[p_index].disabled;
}
void TreeItem::set_editable(int p_column, bool p_editable) {
	ERR_FAIL_INDEX(p_column, cells.size());
	if (cells[p_column].editable == p_editable) {
		return;
	}
	cells.write[p_column].editable = p_editable;
	cells.write[p_column].cached_minimum_size_dirty = true;
	_changed_notify(p_column);
}
bool TreeItem::is_editable(int p_column) {
	ERR_FAIL_INDEX_V(p_column, cells.size(), false);
	return cells[p_column].editable;
}
void TreeItem::set_custom_color(int p_column, const Color &p_color) {
	ERR_FAIL_INDEX(p_column, cells.size());
	if (cells[p_column].custom_color && cells[p_column].color == p_color) {
		return;
	}
	cells.write[p_column].custom_color = true;
	cells.write[p_column].color = p_color;
	_changed_notify(p_column);
}
Color TreeItem::get_custom_color(int p_column) const {