add debug sleep for GPU runner

Author: pmeier

.github/scripts/unittest.sh

@@ -11,5 +11,9 @@ echo '::group::Install testing utilities'
 pip install --progress-bar=off pytest pytest-mock pytest-cov
 echo '::endgroup::'
 
+if [[ $GPU_ARCH_TYPE == 'cuda' ]]; then
+  sleep 3600
+fi
+
 python test/smoke_test.py
 #pytest --junit-xml="${RUNNER_TEST_RESULTS_DIR}/test-results.xml" -v --durations=25