ci: ignore known failures in linux host test

.gitlab/ci/host-test.yml

@@ -398,4 +398,6 @@ test_pytest_linux:
       --target linux
       --pytest-apps
       -m host_test
+    - retry_failed git clone $KNOWN_FAILURE_CASES_REPO known_failure_cases
     - run_cmd pytest --target linux -m host_test --junitxml=XUNIT_RESULT.xml
+      --known-failure-cases-file known_failure_cases/known_failure_cases.txt