[BUGFIX] Add conflicts with broken sf/finder versions

A regression was introduced in symfony/finder
https://github.com/symfony/symfony/pull/26337

This caused PackageManager to not find any core packages
any more in case they were symlinked.

Composer command (after adding conflict):
composer update --lock

Resolves: #84601
Releases: 7.6, 8.7, master
Change-Id: I914c3b3c4a6c12375ebd9fe5442c3f7ff407de72
Reviewed-on: https://review.typo3.org/56541


Reviewed-by: Mathias Brodala <mbrodala@pagemachine.de>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Nicole Cordes <typo3@cordes.co>
Tested-by: Nicole Cordes <typo3@cordes.co>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>