Important: #100658 - Drop use TSconfig options createFoldersInEB and folderTree.hideCreateFolder

See forge#100658

Description

The user TSconfig options createFoldersInEB and folderTree.hideCreateFolder were used in the past to control the existence of the "Create folder" form in Element Browser instances. With the migration of the "Create folder" view into a separate modal used in EXT:filelist, which is based on Element Browser as well, those options became useless and are therefore dropped.