Parameter "topics" not working

[HLrwth]

Hi Bernd,

Thanks for sharing this amazing package. I noticed that for ROS iron, if I specified the topic list that I want to record with
parameter "topics", it still records all topics. I think the reason could be that in the recorder.cpp, the record_options is copied to the topic_filter_ when calling RecorderImpl constructor which is initialized with

rosbag2_transport::Recorder(
    std::make_shared<rosbag2_cpp::Writer>(), rosbag2_storage::StorageOptions(),
    rosbag2_transport::RecordOptions(), "recorder",
    rclcpp::NodeOptions(options).start_parameter_event_publisher(false))

[berndpfrommer]

I haven't noticed this problem yet. Looking forward to a PR :)