[clang] [llvm] Clang: Add nsz to llvm.minnum and llvm.maxnum emitted from fmin and fmax (PR #113133)

[Matt Arsenault via llvm-commits]

arsenm wrote:

> #168838
> 
> OK, now we decides to define `llvm.minnum` and `llvm.maxnum` as same as libm. So we don't need it now. Let's close it.

No, this should still be done 

https://github.com/llvm/llvm-project/pull/113133