[TASK] runTests.sh: Don't mount home, passwd, group

The patch changes runTests.sh and the container
definition to avoid mounting users home, /etc/passwd
and /etc/group. yarn based setups need some special
treatment but in the end bow to shell power, too.

Change-Id: I4e5665d31c5bef4e046e992eddd534ae597cce31
Resolves: #96253
Releases: main, 11.5, 10.4
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/72427


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