[CI] Print failed tests (#942)

Author: oulgen

.github/workflows/test.yml

@@ -132,4 +132,6 @@ jobs:
           if [[ "${{ matrix.expecttest-accept }}" == "true" ]]; then export EXPECTTEST_ACCEPT=1; fi
           if [[ "${{ matrix.ref-eager }}" == "true" ]]; then export HELION_INTERPRET=1; fi
           if [[ "${{ matrix.alias }}" == *"a10g"* ]]; then export HELION_DEV_LOW_VRAM=1; fi
-          pytest --timeout=60
+          # -rf: print failed tests
+          # --timeout: max allowed time for each test
+          pytest -rf --timeout=60