kwargs won't work for DGMulti solver using TensorProductWedges

(or open an issue noting that `kwargs` won't work as expected for `DGMulti` solvers which use `TensorProductWedge` approximations).

_Originally posted by @jlchan in https://github.com/trixi-framework/Trixi.jl/pull/1389#discussion_r1170457005_

Start by reading the DGMulti solver and TensorProductWedge approximation implementation, then trace how kwargs are passed between them. Reproduce the reported behavior and identify the expected kwargs handling; done means kwargs work as expected for DGMulti solvers using TensorProductWedge approximations.

Written by the indexing model from the issue text.