[clang] [llvm] [SPIRV][RFC] Rework / extend support for memory scopes (PR #106429)

[Yaxun Liu via cfe-commits]

yxsamliu wrote:

> Thank you ever so much for the review @VyacheslavLevytskyy! I will create a PR for the Translator as well, since there's some handling missing there; I will refer to it here for future readers. Final check: are you OK with the OpenCL changes @yxsamliu?

LGTM

https://github.com/llvm/llvm-project/pull/106429