Revisit const Real_ptr usage

[artv3]

Some of kernels use const Real_ptr; we believe usage should be Real_const_ptr.

[MrBurmark]

If we change the pointers to Real_const_ptr in the setup macros and anywhere else used we should be good. Just changing them where they are used resulted in issues with failing type checks in RPlaunchCudaKernel which expects the arguments to be exactly the right types.