By Juliette Jabkhiro PARIS (Reuters) -Salah Abdeslam, a self-avowed Islamic State combatant, told a court on Wednesday that he had backed out of detonating his explosive vest during the jihadist rampage across Paris in November 2015 that killed 130 people. A French national of Moroccan origin, Abdeslam said he had pledged allegiance to Islamic State 48 hours before the Paris attacks, the deadliest in postwar France, but that he had harmed no one. “I experienced a situation that not many people have experienced, people who took a step back, who changed their minds,” Abdeslam, 32, told the court…