For all his extroverted personality as an affable mensch, George Clooney, is no stranger to working in a minor key. Nor is he alien to the ideas of moody space films (“Solaris“), art movies (“The American“), or films with an introspective bent. All of those ideas, including something epic and awe-inspiring, appear to be at work in Clooney’s latest directorial effort “The Midnight Sky,” which looks like its melding the scope of something like “Gravity,” to more humanist sensibilities about survival, connection, and hope despite the ways humankind seems destined to doom itself.