[alpaka] Add support for the SYCL back-end #407
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With #1845 and other following contributions, alpaka now supports also SYCL/oneAPI as a back-end to target CPUs, Intel GPUs and FPGAs.
This PR propagates the support for SYCL also in pixeltrack.
Some comments:
--syclcpu
and--syclgpu
all_of_group
/any_of_group
on CPU, SYCL kernels do not support zero-lenght arrays, device global variables are not supported in the SYCL back-end yet)sycl namespace
)In addition, the vendor-specific RNG support in alpaka has been disabled.