Use NodeParametersInterface to track use_sim_time parameter for time source

[fujitatomoya]

Minor Enhancement

see

rclcpp/rclcpp/src/rclcpp/time_source.cpp

Line 280 in 411dbe8

// TODO(tfoote) use parameters interface not subscribe to events via topic ticketed #609

it uses basically /parameter_events subscription to check the use_sim_time which belongs to the node.
but as mentioned TODO, this can be done more efficiently using NodeParametersInterface.

Implementation considerations

reference implementation (pretty old, reference only): fujitatomoya@7867e98