[yaspgrid] use constexpr tables for `BinomialTable`, `EntityShiftTable`
This means the tables are computed at compile time and there is no need to call an init()
function.
With dune-python, one can currently end up with two lookup tables (staging/dune-python#23).
This works around the problem as now both tables contain the correct values, instead of only the one init()
was called for.