Barb and Star do indeed go to Vista Del Mar in “Barb & Star Go to Vista Del Mar,” but viewers are advised to put their maps away and let the movie follow its own deranged path. A goofy and absurdist comedy in which anything can happen, and it usually will, Kristen Wiig and Annie Mumolo’s long-awaited follow-up to the 2011 hit “Bridesmaids” absolutely plays by its own rules.