CA: Migration from ca::MaterialMap to kf::MaterialMap

Since the CA tracking algorithm already runs on the kf::Setup instance, there is no use in the old material budget map classes in the cbm::algo::ca namespace, so they were deleted.

Additionally:

• clean-up of namespaces in cbm::algo::ca and cbm::algo::kf
• ca.par-files update (now without the material budget maps) -- !206, bugfix: !213