Add full stokes operator with p1 viscosities

operators-full_stokes.toml

operators/full_stokes/CMakeLists.txt

...orElementwiseFullStokesP1ViscosityIcosahedralShellMap.cpp

...orElementwiseFullStokesP1ViscosityIcosahedralShellMap.hpp

...wiseFullStokesP1ViscosityIcosahedralShellMap_macro_3D.cpp

...wiseFullStokesP1ViscosityIcosahedralShellMap_macro_3D.cpp

...wiseFullStokesP1ViscosityIcosahedralShellMap_macro_3D.cpp

...wiseFullStokesP1ViscosityIcosahedralShellMap_macro_3D.cpp

...wiseFullStokesP1ViscosityIcosahedralShellMap_macro_3D.cpp