[2.3.0] Checkmk Werk 16114 created: folder_config: Extend GET and DELETE endpoints folder name pattern to match the CREATE enpoint one

Title: folder_config: Extend GET and DELETE endpoints folder name pattern to match the CREATE enpoint one Class: fix Compatible: compat Component: rest-api Date: 1696846527 Edition: cre Knowledge: doc Level: 1 Version: 2.3.0b1 Previously, the folder name pattern for GET and DELETE endpoints were stricter than the CREATE, provoking that a new folder could not be retrieved nor deleted. This fix widens the folder name pattern on GET and DELETE endpoints to align with the CREATE one.