[llvm] [AMDGPU] Replace relaxed-buffer-oob-mode feature with module flag (PR #160922)

[Piotr Sobczak via llvm-commits]

piotrAMD wrote:

Unless I misunderstood, this cannot be made to work with the current Min(0/1) behavior. 
Linking "absence" + "relaxed" gives "strict" under Min semantics, so not what you'd expect?
If "absence" means "strict" then the result "strict" is logical.
I think true "neutral" requires tri-state with the caveat I mentioned in the last comment.

https://github.com/llvm/llvm-project/pull/160922