Theater, by its very nature, is a collaborative event. The playwright, director, actors, technical crew, and, of course, the audience all come together to create a moment in time. When two theatrical companies join forces to put together a project, it can be the best of many worlds and create a wonderful synergy. Such is the case with the co-world premiere of “Tiny Father,” which began its run at the Barrington Stage Company this week in collaboration with Chautauqua Theater Company.