[llvm] [libsycl] USM Aligned allocation functions (PR #213468)

[via llvm-commits]

Robertkq wrote:

@KseniyaTikhomirova @sergey-semenov 

Can you take a look over this PR as well? It covers addition of `aligned_*` USM allocation functions, adds more tests to the existing ones. Thanks!

https://github.com/llvm/llvm-project/pull/213468