updates for libxc6 and cuda_mpi_omp
Description
The new cuda_mpi_omp and libxc6 builders requires some more updates to the tolernces.
News snippet
updates for libxc6 and cuda_mpi_omp
Checklist
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I have checked that my code follows the Octopus coding standards -
I have added tests for all the new features added in this request.