Make pytest run ignoring the ones with collection error (#3692)

PyTorch lightening is having issue with the nightly PyTorch.
Let the other tests still run.

.github/scripts/unittest-linux/run_test.sh

@@ -12,6 +12,7 @@ env | grep TORCHAUDIO || true
 export PATH="${PWD}/third_party/install/bin/:${PATH}"
 
 declare -a args=(
+    '--continue-on-collection-errors'
     '-v'
     '--cov=torchaudio'
     "--junitxml=${RUNNER_TEST_RESULTS_DIR}/junit.xml"

.github/scripts/unittest-windows/run_test.sh

@@ -12,5 +12,5 @@ python -m torch.utils.collect_env
 env | grep TORCHAUDIO || true
 
 cd test
-pytest --cov=torchaudio --junitxml=${RUNNER_TEST_RESULTS_DIR}/junit.xml -v --durations 20 torchaudio_unittest
+pytest --continue-on-collection-errors --cov=torchaudio --junitxml=${RUNNER_TEST_RESULTS_DIR}/junit.xml -v --durations 20 torchaudio_unittest
 coverage html