P’nut the squirrel was ratted out by someone — and his upstate owners think it was over jealousy. Mark and Daniela Longo told The Post on Sunday that they had been cashing in on their furry Internet sensation — who helped steer followers to their raunchy OnlyFans page — before he was seized from their animal sanctuary and euthanized by state environmental officials over rabies fears last week. The couple’s financial success, fueled at least partly by P’nut, may have been enough to drive someone to drop the dime on them — and their fluffy-tailed cash cow, they said. “Maybe...