By Gabrielle Tétrault-Farber, Karolos Grohmann and Julien Pretot BEIJING (Reuters) – The Russian coach of the 15-year-old figure skater embroiled in an Olympic doping scandal broke her silence to defend Kamila Valieva on Saturday, while the sport’s highest court said it would hold a hearing on Valieva’s Winter Games future on Sunday. Coach Eteri Tutberidze said she was certain Valieva was “clean and innocent” in an interview with Russian state television after hugging her figure-skating prodigy, who trained again at the rink next to the Capital Indoor Stadium on Saturday afternoon. Valieva’s f…