MOSCOW, Dec 29 (Reuters) - A joint venture controlled by Russian billionaire Vladimir Potanin has acquired a 25% stake ​in IT infrastructure provider Selectel, one of the venture's ‌partners said on Monday, as Moscow seeks to boost development of home-grown artificial ‌intelligence models. Catalytic People, a joint venture between Potanin's holding company Interros and T-Technologies, the owner of online lender T-Bank, has purchased a 25% stake in Selectel, valued at some 16 billion roubles ($206 ⁠million ...