refs #22013 [finc] add selenium tests

* add getitbox tests for adrl
* add basic tests for UBL
* also refs #22797
* handle groups and different environments
* add account test for WHZ
* also refs #22801
* implement selenium grid for parallel execution
* add adlr test for user delete / reactivation
* add test for user partial order
* also refs #22589

co-authored by: Alexander Purr <purr@ub.uni-leipzig.de>
* remove redundant records
* not part of rules section

refs #22013 [finc] minimal doc improvements