SAN JOSE, Calif. – A six-game San Jose Sharks homestand ended with a third-period collapse and another frustrating loss. After losing a two-goal lead late in the third period, and following a scoreless overtime, the Sharks were outscored 3-2 in the shootout and lost 5-4 to the Anaheim Ducks before a sellout crowd of 17,562 at SAP Center. It was the Sharks’ third straight shootout loss, as their record fell to 3-8-3. Leading by two, the Sharks allowed two goals in the final 4:02 of the third period, as Mason McTavish scored on a breakaway after he served a penalty and Adam Henrique scored with …