From left, Suzanne Kimball, Emaline Williams, Scott McGowan and Christopher John Young co-star in Centenary Stage Company’s production of Steve Martin’s “Meteor Shower.” Steve Martin is undeniably a comedic genius. But his play “Meteor Shower” is as scattered as a standup comedy routine. Truly bizarre absurdity mixes with social satire and some attempts at psychological revelations. “Meteor Shower” has some very funny moments, to be sure, but feels like what it is: The work of a comedian dabbling in writing plays rather than the work of someone truly devoted to that craft. The one-act play, wh…