Test cases should skip tests rather than fail if tests run on a system with no OpenCL drivers

[diptorupd]

Currently the conda recipe for PyDPPL only works on a system that has OpenCL (both CPU and GPU) drivers installed. The behavior does not allow building the package on a build server with no OpenCL. Should we change the behavior?

[reazulhoque]

We should not change this behavior as this does not allow us to test whether the build was successful or not. Closing this issue as this behavior is intended.