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

[Vyacheslav Levytskyy via cfe-commits]

VyacheslavLevytskyy wrote:

@AlexVlx I don't see much objections against https://github.com/llvm/llvm-project/pull/108528 on a conceptual level, so what do you think about merging it into this PR in a way that I commented above, by changing getmemScope() and moving init into its static vars?

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