Draft: Use the topology id directly in the Lagrange cache

When implementing the StaticLagrangeLocalFiniteElementCache I used the GeometryType::Id to identify GeometryTypes with a fixed type. The motivation is the capability Dune::Capabilities::hasSingleGeometryType. But there is actually another id, the topologyId that is encoded in the capability. This MR changes the template parameter from GeometryType::Id to unsigned int.

Which type could better encode that we do not have a single geometryType? Or do we need to have 2 parameters for this, a bool and the topologyId`?

Before, I used the special value GeometryType::Id(~0u) to identify mixed geometry types. What does this value actually stand for?

It gives me (none, 255), ok this would be ok as the fallback type.

Testing GeometryType(~0u,2) I get (other [4294967295], 2)

changed the description

mentioned in merge request staging/dune-functions!248