Feature/cmake test drop dune26
See merge request !2375 (merged)
(cherry picked from commit 4a6fd126)
f0b9e99e [cmake][test] Forward to dune_add_test and add function evaluating test guards 64af647a [example] Fixup liddrivencavity test cmake skip c58be6a0 [doc][cmake] Improve dumux_evaluate_cmake_guard doc