[SYCL][HIP] Implement proper support for gloal offsets

[npmiller]

Global offsets are currently not supported with the HIP plugin, see:

• [SYCL][HIP] Disable partial global offset support #4905

The HIP ABI has an implicit args mechanism that seems to be meant for global offsets amongst other things, we may be able to use that to implement support for it in SYCL, however it doesn't look like the HIP API let's us pass global offsets through. So we may need a similar mechanism as the CUDA plugin where we pass the global offsets as an extra kernel argument, this would also require an IR pass to re-write the kernel entry points and global offset access.

[npmiller]

This was fixed here:

• [SYCL] Generalize GlobalOffset and enable it for AMDGPU #5855