Add the same minimum round requirement security has to nukeops

[unfunnyperson]

Time and time again, I have seen nukeops get absolutely crushed because half of them were new players who didn't know how to switch hands or how to take off their backpack. As a teamwork-centric antagonist, having multiple players with absolutely no idea what they are doing can lead to incredibly short rounds that are boring for crew and frustrating of operatives.

Might be an interesting idea to extend this to other antags like traitor to prevent new players having no clue how to do antag things.