[llvm] [AMDGPU] Re-enable closed-world assumption as an opt-out feature (PR #115371)

[Shilei Tian via llvm-commits]

shiltian wrote:

What format are they provided in? IR or binary? If they are binary, it is essentially calling from one device image to another. If they are IR, we should have seen them at this moment.

https://github.com/llvm/llvm-project/pull/115371