With the pandemic blackout, local theaters (and theater critics) have had to come up with all kinds of alternatives to attract and keep their audiences. Goodman Theatre, after canceling its current season, still plans to stag four productions in the fall, including Brian Friel’s notable “Molly Sweeney.” (In last week’s column, I gave a “four-gavel” rating to an online performance of this play by a New York company.)Meanwhile, Artistic Director Robert Falls is livestreaming new interviews with distinguished Goodman artists …