Periodic bc: Relocate first_vector_components parameter

Periodic bc: Relocate first_vector_components parameter

This commit removes the first_vector_components parameter from
GridTools::collect_periodic_faces(), as well as, the
first_vector_components data field from the struct
GridTools::PeriodicFacePair. The parameter is no added to all varianst of
DoFTools::make_periodicity_constraints instead.

This is an incompatible change made for consistency: A PeriodicFacePair
should not store first_vector_components and with that information about
the underlying finite element space.