t/ had lots of directories and files mirroring src/lib/Hydra. This moves those files under t/Hydra
This is causing CI to fail after #1026 merged. #1026 had a green bill of health, but #1003 increased perlcritic to level 4. #1003 was not part of #1026 so it was not checked at perlcritic level 4.
Returns a list of constituent builds