Support SIMD/POD containers and vectorised selections in new functors

The Rec MR has most of the description, go read that.

This MR:

• Replaces PrFilterIPSoA with a functor-based filter.
• Tweaks the configuration slightly, so the Hlt1WithMuonID options exercise the functor machinery more.

Goes with LHCb!2004 (merged) and Rec!1601 (merged).

cc: @ahennequ @sponce @ibelyaev @apearce @sstahl @graven