[BUGFIX] Avoid using hardcoded uid of repository record

As some situations might lead to a different uid set in the database
the correct repository should be found by the method 'findOneTypo3OrgRepository'.

Resolves: #86591
Releases: master
Change-Id: I8a1b9e8241b054f4d864dd5474f9eddfeaa44a6c
Reviewed-on: https://review.typo3.org/58609


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Nicole Cordes <typo3@cordes.co>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Josef Glatz <josef.glatz@typo3.org>
Reviewed-by: Tomas Norre Mikkelsen <tomasnorre@gmail.com>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>