Support for building hip-tests

[fwyzard]

Would it be possible to add some kind of support for building the official (?) HIP tests at https://github.com/ROCm/hip-tests/ with HIP-CPU ?

[AlexVlx]

It should be possible for some, primarily for the Catch2 ones. There are some GPU / ROCm specific bits being tested that will be difficult to disentangle. I will look into it.