Component accumulator in DAODs - part 3d: flavour tagging

This MR adds a new config fragment for configuring flavour tagging in the DAOD production. It will be used in particular by PHYS and PHYSLITE. It is largely an unwrapped version of the existing method, which had to hide the component accumulator since the derivation framework wasn't using it. In the CA version of the derivation framework this wrapping is no longer needed and the CA instance can be returned by the method.

In addition to the new config fragment, the relevant lines are added to PhysCommonConfig to make it run in the CA version of PHYS.

Note that since this MR only touches the new config of the derivation framework, which isn't yet in use, it will have no impact on any ongoing production.