Steve Perry didn’t reunite with Journey for this week’s episode of “America’s Got Talent,” but an unassuming middle-school janitor named Richard Goodall did a phenomenal job of filling in for him. Goodall stunned the audience and the show’s judges and even earned a rare “golden buzzer” from model and judge Heidi Klum. The 55-year-old custodian from Terre Haute,Indiana, joined the NBC show for its 19th-season premiere and crushed a rendition of Journey’s smash 1981 hit “Don’t Stop Believin.’ ” When introducing himself to the show in a pre-taped interview, Goodall explained that he spent his tim…