Gayle King was spotted leaving her New York City apartment first thing Friday — just hours after reports emerged she was set to leave “CBS Mornings” after more than a decade. The news anchor donned huge sunglasses as she emerged from her Upper West Side building before sunrise, The Post’s exclusive photos show. The 70-year-old, who could be seen clutching her phone and a brown paper bag, emerged hours before she appeared on the air Friday morning — making no mention of her own news as she opened the show. The sighting came after sources told Variety late Thursday that...