By Alek Arend There is growing speculation the Boston Celtics are going to make a run after Portland Trail Blazers star Damian Lillard this summer. An anonymous NBA executive told Heavy.com that Brad Stevens is a big fan of Lillard. And given the Celtics’ recent success this season, they’re a team that may look to buy big this summer ahead of the 2022-23 season. “Brad has a soft spot for him, I know. He is a favorite of his. Small college guy, such a hard worker. They have put themselves in a position to make a move like that. They can build a package around Derrick White and Marcus Smart, wit…