Remove Uncertain kind from Team type

[knoellle]

Why? What?

Team::Uncertain is removed and wrapped with in Option where applicable (only in FilteredGameState::Ready)
Update: there is now only one kicking team in the GameControllerState and the Playing state contains a flag whether the kicking_team sent by the game controller is trustworthy.

This resolves the necessity to match the uncertain Team kind in places where it is always either Hulks or Opponent anyways.
This was especially annoying with the new behavior simulator but I wanted to make this a separate PR.

Background

The FilteredGameControllerState contains a kicking_team field as well as two fields of type FilteredGameState, one for each team.
The FilteredGameState::Ready kind is the only place in our code where the Team could be Uncertain and if it wasn't uncertain, then the kicking team inside this kind was equal to the kicking team in the FilteredGameState.

Fixes #

ToDo / Known Issues

Ideas for Next Iterations (Not This PR)

How to Test

Everything should work as before, there are no functional changes.

[knoellle]

I basically changed everything again, see comment in PR description.
Please have another look.

[oleflb]

Looks good, but have not tested yet

[knoellle]

Rebased due to conflict with #1429.
@oleflb what is the state here?

[oleflb]

Abfahrt 🚂