Make sim_gamestate publish on all robot topics

[timonegk]

Proposed changes

This changes the game controller to have separate publishers for all robot namespaces so that the game state publisher doesn't have to be started multiple times.

Necessary checks

• [ ] Run catkin build
• [ ] Write documentation
• [ ] Create issues for future work
• [x] Test on your machine
• [ ] Test on the robot
• [x] Put the PR on our Project board