WIP: Remove support for running system tests under valgrind

Open Ondřej Surý requested to merge 3198-add-rr-chaos-mode-support into main

P.S: It would be now possible to use:

./configure --use-rr-chaos-mode=valgrind

and

./configure --use-rr-chaos-mode=helgrind

to restore the functionality to some extend.

Closes #3198 (closed)

Merge request reports