[TASK] Simplify runTests.sh DBMS version selection

Remove -j and -k and only use -i to specify
database versions. This is more easy to use,
parse and validate.

Resolves: #101604
Releases: main, 12.4, 11.5
Change-Id: Ie6b9343c6f244a294d636f0e5c09d24c5e1845fb
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/80428


Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>