A man who sent Ariana Grande a 42 pound pumpkin and other weird gifts showed up at the NYC headquarters of her record label wearing a Santa suit … enough to put him on a psych hold. Tim Normandin had been warned by cops to stop harassing Ariana … in addition to the pumpkin, he sent her Yankee candles, a $200 anklet from Kay Jewelers and a rock from the White Mountains of New Hampshire. It’s unclear if she’s getting a restraining order, but it’s always dicey …