[!!!][TASK] Upgrade to composer installers 2.0.0

With this step, the typo3/cms package will not be
installable anymore with composer, but only the
single subtree splitted packages like typo3/cms-core.

To ease the usage, a new package typo3/minimal is
introduced, which has dependencies to all required
TYPO3 extensions, so that composer users can't install
an incomplete code base, at least not when using this package.

composer command used:

composer require typo3/cms-composer-installers ^2.0

Releases: master
Resolves: #83302
Change-Id: Ia1009f62d97be611a03cec5dd437b56cd7866eeb
Reviewed-on: https://review.typo3.org/55049


Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>