Fix Cybran ACU Torpedo upgrade bugging out with transports

This is the same bug, and the same fix, as affected the laser upgrade. While looking here though, I also received a complaint that the Torpedo could fire while the ACU is only just underwater, and unable to be shot. I added a targeting restriction to the upgrade, and also added new target bones to the unit so it can be shot while only just submerged, a change I may replicate for the other ACU and sACU units in the future.