Remove usages of obsolete SpriteView.Sprite.set() (#19500)

Content.Client/Preferences/UI/CharacterSetupGui.xaml.cs

@@ -186,10 +186,10 @@ namespace Content.Client.Preferences.UI
 
                 var view = new SpriteView
                 {
-                    Sprite = entityManager.GetComponent<SpriteComponent>(_previewDummy),
                     Scale = new Vector2(2, 2),
                     OverrideDirection = Direction.South
                 };
+                view.SetEntity(_previewDummy);
 
                 var description = profile.Name;