Add SuiteSparse finder
This one looks pretty good: https://gitlab.dune-project.org/core/dune-common/-/blob/14766f4fa2d49396bbf4a74412f245d4465aba7c/cmake/modules/FindSuiteSparse.cmake
Haven't tested it yet.
This one looks pretty good: https://gitlab.dune-project.org/core/dune-common/-/blob/14766f4fa2d49396bbf4a74412f245d4465aba7c/cmake/modules/FindSuiteSparse.cmake
Haven't tested it yet.