By Robin Lundberg Does Donovan Mitchell make the team a top contender? Will perimeter defense be an issue? Here are the factors that will define Cleveland’s 2022-23 season. Here are the three biggest questions facing the Cleveland Cavaliers. Does Donovan Mitchell make them contenders?The Cavs made perhaps the marquee move of the offseason. But headlines are one thing; wins are another. Mitchell gives them another option as a scorer alongside Darius Garland, and, with the core already in place, the expectations will be for Donovan to have Cleveland positioned as a perennial contender in the Eas…