Simplify General Mockup Manager

[ndunkelb-nasa]

Found this general mockup manager that existed, which makes things a lot nicer. However, I found that the implementation was a bit annoying in that it required your parameter file to look like below. I think before, I wasn't aware of how to get the info for the individual topics without having an extra topic_names parameter that could then be referenced. This new change basically gets rid of the need to have the topic_names parameter and instead just uses the top level values after topics as the topic names.

This was written a while ago, so there might be some other simplifications that could be made now...

`hatch_4060_localization_manager:
  ros__parameters:
    topic_names: 
    - hatch_localization_x
    - hatch_localization_y
    topics:
      hatch_localization_x:
        joint_name: "hatch_localization_x_joint"
        min_position: -0.02
        max_position: 0.02
        initial_position: 0.0
      hatch_localization_y:
        joint_name: "hatch_localization_y_joint"
        min_position: -0.02
        max_position: 0.02
        initial_position: 0.0`

[mtobia-nasa]

Should this script live somewhere other than hatch_4040/scripts?

Seems like it would fit better in mockups_launch_common/scripts

[ndunkelb-nasa]

Should this script live somewhere other than hatch_4040/scripts?

Seems like it would fit better in mockups_launch_common/scripts

Definitely true! Moved.

[eholum-nasa]

I don't think you need this with automatically_declare_parameters_from_overrides=True, I think you can also get errors if it's here and we try overriding this? Not that it really matters here...

[eholum-nasa]

(I blame myself for the format breakage)

Once it's fixed LGTM!