Update overlay tests to WorkflowTests (ATLINFR-4423)
Update overlay tests to WorkflowTests. Currently MC and data test run in parallel which may cause some issues in the new CI system. This splits them which might help with ATLINFR-4423.
Also removed temporary special log parsing as WorkflowTests already have a more detailed one included (prints the whole log if failing).
/cc @fwinkl.
Relates to ATLINFR-4305.
Edited by Frank Winklmeier