The Vegas Golden Knights agreed to terms on a one-year contract worth a prorated $1.5 million with former St. Louis Blues forward Brandon Saad, the club announced Friday. Saad and the Blues agreed to mutually terminate the remainder of his four-year contract after he was waived Wednesday. Saad, who was signed through 2025-26 with an AAV of $4.5 million, elected to forgo the remaining $5.4…