[HIP] Fix memory type detection in allocation info queries and USM copy2D

[GeorgeWeb]

This PR fixes detection of the pointer type for sycl pointer allocation info queries and USM copy2D for the HIP backend.

With regards to urUSMGetMemAllocInfo for UR_USM_ALLOC_INFO_TYPE:
Takes extra care identifying unknown/unregistered memory allocations since ROCm 6.0.0 introduces hipMemoryTypeUnregistered, which we now use to identify system allocations and the attributes query will still return success in this case.

With regards to urEnqueueUSMMemcpy2D:
This is a little awkward workaround. Ideally we'd just use hipPointerGetAttribute but it crashes when used on system / pageable host memory hence using hipPointerGetAttributes to first determine that and ideally use the memory type value. From ROCm 5.7.1 we cannot rely on the memory type member of the attributes struct to detect whether it is device or host as managed allocations finally update it to managed memory type, hence we need to query the type specifically via hipPointerGetAttribute now knowing that the memory handle is not pageable host memory.
Ideally we'd just use allocation flags to determine the memory type and call it a day, but ROCm does not update the user-facing flags member from the attributes struct, so sadly we have no way of relying on allocation flags.

intel/llvm CI: intel/llvm#13059

[hdelan]

LGTM