Update ros2_control_node initialization

[sjahr]

Description

Related to moveit/moveit2#2620

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[sea-bass]

Thanks for doing this!

Can you also update the following doc section with these changes?

https://github.com/ros-planning/moveit2_tutorials/blob/main/doc/how_to_guides/moveit_launch_files/moveit_launch_files_tutorial.rst#setting-up-ros2_control-for-trajectory-execution

[sjahr]

Thanks for doing this!

Can you also update the following doc section with these changes?

https://github.com/ros-planning/moveit2_tutorials/blob/main/doc/how_to_guides/moveit_launch_files/moveit_launch_files_tutorial.rst#setting-up-ros2_control-for-trajectory-execution

I am confused, isn't that already done? https://github.com/ros-planning/moveit2_tutorials/blob/2458f66d709b6e3adfee810fc571398ecaa5f03b/doc/how_to_guides/moveit_launch_files/moveit_launch_files_tutorial.rst

[sea-bass]

I can't read 🤣