[!!!][TASK] Merge ext:recordlist into ext:backend

Extension 'recordlist' is a must-have extension that
is part of 'minimal usable system' and always loaded:

Especially 'backend' has various cross dependencies
to 'recordlist', backend "search" using the list module
for detail display is one of the most obvious ones.

In general it's bad if the main 'backend' extension
has such direct dependency towards another more
specific extension: The core development slowly
strives to have the tuple 'core-backend-frontend'
as main set of crucial extenions, with eventually
making 'backend' and 'frontend' optional in some
happy future.

To solve the unfortunate dependency from 'backend'
to 'recordlist', 'recordlist' is now merged into
'backend', reducing the set of extensions required
for a 'minimal usable system' by one.

> composer update --lock

Change-Id: Ie73ccb992b9ad29626478ff9acd6dc9a15b8aa9a
Resolves: #98443
Releases: main
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/75876


Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>