[llvm] [offload] add support for aligned allocations (PR #203353)

[Alex Duran via llvm-commits]

https://github.com/adurang approved this pull request.

Looks overall good to me but please make changes to follow the LLVM style.

It would be nice to also adjust GenericPluginTy::data_alloc to support alignment but we can do that in a follow-up.

https://github.com/llvm/llvm-project/pull/203353