Abigail Spencer, Meghan Markle. Getty Images (2) Meghan Markle’s inner circle, including former Suits costar Abigail Spencer, are her official American Riviera Orchard taste-testers. “This jam is my jam,” Spencer, 42, wrote via Instagram on Sunday, April 21. “A delicious taste of what’s to come indeed. Love you so M.” In her upload, Spencer, dressed…