[llvm] [SPIR-V] Align memory scopes with SPIR-V specification and LLVM expectations and change default mem scope value (PR #108528)

[Vyacheslav Levytskyy via llvm-commits]

VyacheslavLevytskyy wrote:

I close this, because https://github.com/llvm/llvm-project/pull/106429 got integrated suggestions from this PR

https://github.com/llvm/llvm-project/pull/108528