ClimaCoreVTK: Add `basis = :lagrange` support for hybrid 3D spaces

As more 3D examples/test cases are being developed, it is important for debugging/verification to be able to visualize the 3D hybrid (2DX) spaces, both Cartesian and spherical.

Currently, our ClimaCoreVTK library does not support the `basis = :lagrange` option for such spaces. It would be good to add it together with its related unit tests.

(PR #655 was a separate PR that added unit tests to the spherical case. If support is added, that PR can be used as a base for the unit tests bit)

Start by inspecting the ClimaCoreVTK library and PR #655, which added unit tests for the spherical case. Trace how 3D hybrid (2DX) spaces are handled for other bases, then determine the related unit-test coverage needed for both Cartesian and spherical spaces. Done means :lagrange visualization support and passing tests for those cases.

Written by the indexing model from the issue text.