You could spawn regular bots, but that would not be done via the map. It would have to be done though the server playing the map.
What you would have to do map side is using things like NPC clipping to control where the bots can move and what they do. It would not be perfect, but if all you want is them standing and shooting, you could confine them to a room with a NPC clipped window. They would be able to see and shoot through it, but not walk out of the area.
As for them being MVM bots, that's just a skin. Functionally the bots are very similar as I believe the MVM are given different loadouts as well as the skin change.