[llvm] [Offload] Add MPI Proxy Plugin (PR #114574)

[Jhonatan Cléto via llvm-commits]

================
@@ -6,6 +6,7 @@
 // UNSUPPORTED: amdgcn-amd-amdhsa
 // UNSUPPORTED: nvptx64-nvidia-cuda
 // UNSUPPORTED: nvptx64-nvidia-cuda-LTO
+// UNSUPPORTED: nvptx64-nvidia-cuda-mpi
----------------
cl3to wrote:

I think we could have the `mpi` feature, but in cases where only one or a few of the MPI targets lack support for the test, wouldn’t we run into the same problem?

https://github.com/llvm/llvm-project/pull/114574