[MM-56061] Only render where field in model.AppError when it's present (#25648)

* Only render where field in model.AppError when it's present

* Remove trailing comma from permission error

server/channels/api4/user.go

@@ -947,7 +947,7 @@ func requireGroupAccess(c *web.Context, groupID string) *model.AppError {
 
 	if group.Source == model.GroupSourceLdap {
 		if !c.App.SessionHasPermissionTo(*c.AppContext.Session(), model.PermissionSysconsoleReadUserManagementGroups) {
-			return c.App.MakePermissionError(c.AppContext.Session(), []*model.Permission{model.PermissionSysconsoleReadUserManagementGroups})
+			return model.MakePermissionError(c.AppContext.Session(), []*model.Permission{model.PermissionSysconsoleReadUserManagementGroups})
 		}
 	}