[ci] Capture exit code on full test run by setting pipefail (compiler-research#97)

Author: aaronj0

.github/workflows/ci.yml

@@ -730,7 +730,9 @@ jobs:
         python -m pip install numba
         echo ::endgroup::
         echo ::group::Run complete test suite
+        set -o pipefail
         python -m pytest -sv | tee complete_testrun.log 2>&1
+        set +o pipefail
         echo ::group::Crashing Test Logs
         # See if we don't have a crash that went away
         # Comment out all xfails but the ones that have a run=False condition.