Feature: #79240 - Single cli user for cli commands

See Issue #79240

Description

Accessing TYPO3 functionality from the command line has been simplified. Single commands no longer require single users in the database, instead all cli command use the username _cli_. This user is created on demand by the framework if it does not exist at the first command line call. The _cli_ user has admin rights and no longer needs specific access rights assigned to perform specific tasks like manipulating database content using the DataHandler.

Impact

Creating and managing command line tasks has been simplified, all existing _cli_* users can be deleted.