AthenaPoolCnvSvc: Adjust test for base class changes.
Add *WithKeyUntyped methods from ITPCnvBase to dummy converter test class.
GitLab jobs artifacts no longer stored forever as of Monday, November 4th 08:30h. Further information under https://cern.ch/otg0152576
Add *WithKeyUntyped methods from ITPCnvBase to dummy converter test class.