I'm sure the Russians 'train to fight' like everyone else. I would think that not only do they have the right to run their manoeuvrers against the ship, but are in fact duty bound to get their training value from the opportunity presented. If they didn't, they would be incompetent surely? A bit of an airshow at the end of the sortie enjoyed by all by the looks of it. Can't be much fun looking at empty blue horizons day after day.
If duty bound as you suggest to train as you fight (I don't disagree) then I doubt the 135 crew would ever have seen the Russian aircraft. In war they'd have dispatched the aircraft quickly, not taking time to increase their own risk.
Just the same for a run in at a ship with extensive AD capabilities.