Upgrade temporary __buffer infrastructure to use USM where possible

[danhoeflinger]

It would be good to upgrade __buffer_impl within oneDPL to use USM when it is able to for performance reasons.
We should be able to just utilize __result_and_scratch_storage inside of __buffer_impl in parallel_backend_sycl_utils.h, but there may be some nuance and complications when handling arbitrary typed value types.

This has the potential to provide a performance boost to all APIs which use temporary storage internally in the form of a sycl buffer currently.

This issue stems from conversation in #1879 (comment)_