Support non-DVCommonBase Particle producers

Algorithms which produce LHCb::Particle objects must be treated specially in the persistence logic as they produce output which is not directly consumed by other algorithms but must be persisted.

We have a hack to support this for algorithms which derive from DVCommonBase. We need similar behaviour for LHCb::Particle producer algorithms which are Gaudi::Functional. Adding such an algorithm to an HLT2 line causes Moore to fail because the ANN service is not correctly configure with the 'hidden' dependencies.

/cc @cmarinbe this affects FunctionalDiElectronMaker