[llvm] [Github][OpenMP] Adding rule for OpenMP label (PR #65331)

[Joseph Huber via llvm-commits]

jhuber6 wrote:

> > Or was the idea to have the clang/flang parts as part of *-libomp and *-libomptarget?
> 
> No, that will be too much. I'm not even sure if we need `openmp-libomptarget` TBH.

Yeah, I don't know how much granularity people expect with this stuff, since we'd probably need to do one for libompd and all the other stuff. Just thinking because `libomptarget` is very separate from libomp at this point. I'm fine either way with just OpenMP.

https://github.com/llvm/llvm-project/pull/65331