MLIR Translation: Implement Barrier0Op

[gmarkall]

EDIT: I think maybe the git history was rewritten after I built llvm-modern, so although there was only one commit to llvm-version.env, I think the version changed out from under my existing build.

Locally I'm getting a lot of failures like:

FAILED tests/numba_cuda_tests/cudapy/test_atomics.py::TestCudaAtomics::test_atomic_add - RuntimeError: llvm70 translation failed: unsupported NVVM op: nvvm.barrier0

I see it was removed last week in llvm/llvm-project#195608, so I'm not sure if this is because I have some misconfiguration in my setup (non-matching versions of libraries / LLVMs) or because my setup is just a little different from that in CI and I'm running into a legitimate issue, but adding an implementation of the NVVM::Barrier0Op seems to resolve it - making this PR for comments / discussion.

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[gmarkall]

/ok to test

[VijayKandiah]

Yes, barrier0 op was recently removed and we bumped the llvm version we pull in to be newer than this change to account for Jie's upstream changes. We shouldn't need to add support for it. This is most likely a local environment misconfiguration. Perhaps you have bindings from an older LLVM installed locally?