New York Jets cornerback Kris Boyd left a trendy eatery in the heart of Manhattan with two other Gang Green players moments before he was shot because he felt the “vibe” inside was off, sources told The Post Sunday night. Boyd, 29, is in critical but stable condition  at Bellevue Hospital after sustaining two gunshots to the abdomen shortly after 2 a.m. Sunday, police said, though they did not originally identify Boyd as the victim. He was enjoying a night out at Sei Less, an Asian-fusion