FeatureFlags are now moved to GameConfig - Reflect this inside Builder/Runner

[JaXt0r]

Hint: Needs to be done after #39

With @lmichaelis new architecture, we alter the way, how we handle FeatureFlags. They're now a ScriptableObject which is added to Bootstrap component. We need to alter it's behaviour

• from: Call FeatureFlagTools.cs and reset all flags to production value.
• to: Set a specific GameConfig asset (e.g. Assets/Gothic-UnZENity-Core/Resources/GameConfigurations/Production.asset) into the proper Bootstrap component in the scene.

[JaXt0r]

Right now we set Production as the default GameConfiguration within main branch. I don't see why we would need to overwrite this via pipeline as of today. Can be closed for now.