Include CudaRdcUtils module in VecGeomConfig

VecGeom clients using the CUDA interface should (ideally) use the cuda_rdc_...
CMake functions to build/link their libraries/applications.

Ensure these are available by including the CudaRdcUtils module if it is
present.
5 jobs for bmorgan/update-cuda-build in 9 minutes and 11 seconds
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Status Name Job ID Coverage
  Build
passed clang-format #17706989

00:01:23

passed code_checks #17706990

00:09:02

passed with_NAVINDEX #17706992
cvmfs

00:07:41

passed with_ROOT #17706991
cvmfs

00:05:35

 
  External
failed jenkins

08:38:27