A set of fixes for partially incomplete test setup in
functional tests and a series of undefined array index
warnings in system under test code.

Resolves: #95630
Releases: master
Change-Id: Ia628eb93912c85bee1e472367e2f209abec1abe3
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/71628


Tested-by: core-ci <typo3@b13.com>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Jochen <rothjochen@gmail.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Jochen <rothjochen@gmail.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>