Removed ign_ros2_control from dependencies.repos

[roni-kreinin]

Description

Added instructions for using ros2-testing package server Linter fix

Type of change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Also list any relevant details for your test configuration.

# Run this command
ros2 launch package launch.py

Checklist

• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation

[alsora]

Closing this PR as the requirement for ign_ros2_control 0.4.0 will be enforced in the released package as discussed.