[llvm] [Github][Bazel] Add Workflow to Run Bazel Build (PR #165071)

[Jordan Rupprecht via llvm-commits]

https://github.com/rupprecht commented:

Thanks! FYI @keith @aaronmondal as the other bazel owners.

One notable difference vs the current buildkite setup: this runs `bazel test ...` instead of `bazel query ...| xargs bazel test`. The query/xargs is a hack to make sure that targets tagged "manual" will still be built. It comes from the IREE build setup, but AFAIK we don't need it for LLVM -- skipping "manual" targets should be fine (and expected).

https://github.com/iree-org/iree/blob/330c4401b737756c422353142949fcc610ec102a/build_tools/bazel/build_test_all.sh#L129

https://github.com/llvm/llvm-project/pull/165071