[BUGFIX] Respect sorting when adding main modules

When adding a new main module, the "position" is now taken into
account, allowing TYPO3 Core also to use the addModule API
everywhere.

Resolves: #47663
Releases: master
Change-Id: I733ee92eada88f09fd247fa818c018dc6bee62d6
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63724


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Susanne Moog <look@susi.dev>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Susanne Moog <look@susi.dev>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>