Allow Friendly Bosses

[assyrianic]

So VSH2 itself is specifically designed to be a few-vs-all type boss mode...
However, VSH2's structures allows it so that, with a very small amount of internal tweaks, you can have boss vs red+friendly boss modes.

Given how VSH2 already works, you can expand that logic by turning all of red team into friendly bosses, thus a boss vs super boss mode.

Also expanding on that logic, selecting a bunch of bosses for blu and converting the rest of red into bosses.

[assyrianic]

another idea but have parameters so that there's Red-Only bosses.