Set up build with hipSYCL

Set up build with hipSYCL

The kernel code is currently non-functional on NVIDIA/AMD hardware, but
the build itself is useful to ensure code portability.

- Disabled LeapFrog for hipSYCL. With `float3` being used in the host
  code, it is easiest to just disable the integrator until #3312 is
  resolved. This will have to be resolved in order to run full MD loop
  on GPU with hipSYCL. See #3941.

- Some warnings from the compiler and include headers silenced.

- Workarounds for features not supported by hipSYCL are introduced.
- - Shuffles. Should work, but not tested. Hopefully, they will be
    introduced in the mainline hipSYCL soon.
- - Barrier synchronization. Intel-specific extension to SYCL which can
    be imitated fairly well with native OpenCL/CUDA calls, but is
    stubbed very stupidly now. Proper solution will be done after #2527
    and #3924 are resolved.

- CI jobs are added. The set of target device architectures is chosen
  semi-arbitrarily, since the code is not being run yet anyway. Main
  concern was to have both HIP and CUDA there.

Refs #3923.