Revert cruiser slots changes

[pillow]

I really wish we recorded the early Battlecruiser fights me and Haste had when the BC heavy pointed forward to show people proof of how utterly, unapologetically terrible the gameplay was back then. If the heavy points forwards, then the best play is to drive straight at the enemy, and shoot your gun. That's all. You do nothing else with the rest of your guns. You don't broadside, you don't kite, you just joust until someone dies. There's no gameplay involved, at all. It was the same for Gunboats too before the mine was introduced, for the record. You just drove at the enemy with your forward gun and held down right click. Riveting gameplay.

Cruisers, before the rework, suffered from the age-old issue of "more armor ship more winner" because whoever had the bigger numbers just won, similar to old Gunboats. Cruisers *after* the rework suffered from "You made one mistake, I got behind you, I have won the fight", because their heavies pointed forwards so the best strategy was to drive forward and hold right click with said heavies. Notice a trend?

We are well aware that Battlecruisers and Cruisers look very silly with their biggest guns pointed straight backwards, but without this theres next to no depth to them at all. It just devolves into mindless right clicking until someone loses.