RFC: Merge RunConfigurations

I was unhappy with the current situation, that there were 2 different RunConfigurations (one for Run and one for Debug). So i merged them together.

When you create a "Go Application" now, you can use it to Run and/or Debug a project.

I've merged the Code together, so there is only one RunConfiguration/ProgramRunner/Producer/... left.
Also added a new Tab to the RunConfigurationEditor containing the needed Debug-Configurations.