Add versions to repo instead of exposing the root version as env var,
when composer installing on CI.

This has the benefit, that these versions can be automatically
changed by darth
(https://github.com/TYPO3/darth/pull/18/commits/083016b43a6ab5860b5a680cbab7d25a890ea0b6)

and that all installs, even the ones where the env vars are not exposed,
use consistent versions.

Releases: main
Resolves: #96102
Change-Id: Ic0f3d77fe21f47b1d3b09041800018885bfb4409
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/72406


Tested-by: core-ci <typo3@b13.com>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>