Committed Changes for DNN-5909 - GetFoldersByPermission Performance Improvement

Changes to the GetFoldersbyPermission procedure to improve performance.  Change was removing "Users" and "UserRoles" from the last query in the procedure.  These tables are un-used, not returned, and not filtering any data.  Removing these reduce the CPU cost greatly.  Full details on DNN JIRA ticket 5909!
As an FYI to any other reviewer, I just did the diff between this and the most recent version (from [DNN 7.0.5](https://github.com/dnnsoftware/Dnn.Platform/blob/development/Website/Providers/DataProviders/SqlDataProvider/07.00.05.SqlDataProvider#L80)), and the main change was the removal of the following two lines from here:

    JOIN {databaseOwner}{objectQualifier}UserRoles UR ON UR.RoleID = FP.RoleID
    JOIN {databaseOwner}{objectQualifier}Users U ON U.UserId = UR.UserId