### 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(), -1);
	return cells[p_column].custom_font_size;
}
void TreeItem::set_tooltip_text(int p_column, const String &p_tooltip) {
	ERR_FAIL_INDEX(p_column, cells.size());
	cells.write[p_column].tooltip = p_tooltip;
}
String TreeItem::get_tooltip_text(int p_column) const {
	ERR_FAIL_INDEX_V(p_column, cells.size(), "");
	return cells[p_column].tooltip;
}
void TreeItem::set_custom_bg_color(int p_column, const Color &p_color, bool p_bg_outline) {
	ERR_FAIL_INDEX(p_column, cells.size());
	if (cells[p_column].custom_bg_color && cells[p_column].custom_bg_outline == p_bg_outline && cells[p_column].bg_color == p_color) {
		return;
	}
	cells.write[p_column].custom_bg_color = true;
	cells.write[p_column].custom_bg_outline = p_bg_outline;
	cells.write[p_column].bg_color = p_color;
	_changed_notify(p_column);
}
void TreeItem::clear_custom_bg_color(int p_column) {
	ERR_FAIL_INDEX(p_column, cells.size());
	cells.write[p_column].custom_bg_color = false;
	cells.write[p_column].bg_color = Color();
	_changed_notify(p_column);
}
Color TreeItem::get_custom_bg_color(int p_column) const {