[llvm] [SPIR-V] Re-implement switch and improve validation of forward calls (PR #87823)

[Vyacheslav Levytskyy via llvm-commits]

VyacheslavLevytskyy wrote:

@Keenuts Thank you! I created https://github.com/llvm/llvm-project/pull/92390 to address the issue.

https://github.com/llvm/llvm-project/pull/87823