[llvm] [SPIRV] Emit intrinsics for globals only in function that references them (PR #178143)

[Juan Manuel Martinez Caamaño via llvm-commits]

jmmartinez wrote:

Reverting this due to a suspicious ASAN failure: https://github.com/llvm/llvm-project/pull/179268

https://github.com/llvm/llvm-project/pull/178143