It’s snack time. Target is taking aim at Costco after recently rolling out a brand new, in-store snack bar in NYC. The Minnesota-based retailer did a major rebrand at its SoHo location — complete with a new grab-and-go section.  But don’t get too comfortable; the snack bar will not have any tables and chairs — or any place to sit and eat like the setup at Costco. Instead, Target is zeroing in on hungry shoppers…