Update unit tests that ensure that src.rpms of failed tasks are not added to products

After the migration to the new modularity workflow, I stumbled upon an error when running [those tests](https://github.com/AlmaLinux/albs-web-server/pull/726/commits/0e1b86a117adbc20de77f0de30c10a7a9e5a84e9#diff-73c93e125caec4c1af3e0c5682265167a86ae892c2864f0a7d5971eeeef7feb3R273-R276). We need to figure out why they are failing as they shouldn't be affected by the new modularity workflow.