There are 12 rules of karma in eastern philosophy. In Hollywood, there’s an unofficial 13th: Marion Cotillard will inevitably return to the Cannes Film Festival .  The Oscar-winning actress hits the Croisette this year with two new projects, representing her 14th and 15th premieres on the famed red carpet in the South of France. One is Bertrand Mandico’s dramedy “Roma Elastica,” and the other a literal barn burner from her frequent collaborator Guillaume Canet called “Karma.”  In “Karma,” Cotillard delivers a searing performance as the mysterious Jeanne, a French woman living in Spain. When her godson goes missing, Jeanne flees the country as a prime suspect and is forced to seek refuge with a religious cult she escaped years earlier. Cotillard is subjected to both physical and emotional brutality. She shows up with her usual artistic flare in a genre she’s not visited in some time: an edge-of-your-seat thriller.…