[TASK] Move typo3/cli_dispatch.phpsh to backend extension

This moves the "typo3/cli_dispatch.phpsh" to the backend
extension as "cli.php". The "typo3/cli_dispatch.phpsh"
becomes a stub which includes the "cli.php".

Resolves: #73029
Releases: master
Change-Id: If5daea584291a9a89c4b805c98799945c424f65f
Reviewed-on: https://review.typo3.org/46394


Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Xavier Perseguers <xavier@typo3.org>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Tested-by: Oliver Hader <oliver.hader@typo3.org>
Reviewed-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: Frank Naegler <frank.naegler@typo3.org>