MEMPHIS, Tenn. — Kobe Bryant became the Lakers’ all-time leading scorer when he dunked to cap a fastbreak with 4:14 remaining in the third quarter tonight against the Memphis Grizzlies. Ron Artest jumped on a loose ball, passed ahead to Jordan Farmar, who shoveled the ball to Bryant for his 28th and 29th points tonight. They also were the 25,192nd and 25,193rd points of his career, enabling him to pass West.