PITTSBURGH — Sidney Crosby is in no mood to get caught up in his own personal narrative, the one eager to attach whatever happens to the Pittsburgh Penguins in Game 7 of the Eastern Conference finals on Thursday against Tampa Bay to the center’s legacy. Forget that Crosby has the game-winning goal in each of Pittsburgh’s victories in its entertaining back-and-forth with the resilient Lightning. Forget that he hasn’t been on the winning side of a post-series handshake line this deep into the playoffs since his glorious night in Detroit seven years ago, which ended with him hoisting the Penguins’ third Stanley Cup. The Lightning are on the verge of a second straight berth in the Finals despite playing the entire postseason without captain Steven Stamkos and losing Vezina Trophy finalist Ben Bishop in the first period of the conference finals when he twisted his left leg awkwardly while scrambling to get into position. Yet Tampa Bay has persevered, ceding the ice to the Penguins for significant stretches, but using its speed to counterattack brilliantly while relying on 21-year-old goaltender Andrei Vasilevski.