Simplify user algs functions
Simplify how the user algorithms are imported in a DaVinci job: the responsibility of the creating dedicated DV nodes is moved from the user to DaVinci.
Improve the way how the LHCbConfigurableUser dependencies are handled and imported in Gaudi application.
Implement the possibility to import configurables from both the old and the new Gaudi framework.
Work on DPA task https://gitlab.cern.ch/lhcb-dpa/project/-/issues/48.