Alec Baldwinwas spotted at a sushi restaurant with a Rust producer days before his involuntary manslaughter trial begins in New Mexico, RadarOnline.com has learned. The embattled star was seen sitting at the bar while chatting with Matt DelPiano at the eatery in Venice Beach. Baldwin was clad in a blue jacket and baggy gray trousers, and was later seen leaving, pushing a small suitcase and carrying a bag. It’s been just a few months since the 66-year-old Saturday Night Live actor was charged — for the second time — with involuntary manslaughter of cinematographer Halyna Hutchins after the prop…