Merge remote-tracking branch 'origin/ci-test-4g-l2sim' into integration_2022_wk33

ci-scripts/Jenkinsfile-GitLab-Container

ci-scripts/cls_containerize.py

ci-scripts/xml_files/container_4g_l2sim_proxy.xml

ci-scripts/xml_files/container_4g_l2sim_tdd.xml

ci-scripts/xml_files/container_4g_l2sim_tdd_down.xml

ci-scripts/xml_files/container_l2sim_proxy.xml

ci-scripts/yaml_files/4g_l2sim_fdd/docker-compose.yml

doc/TESTBenches.md

docker/scripts/enb_entrypoint.sh

docker/scripts/enb_parameters.yaml

docker/scripts/generateTemplate.py

openair3/NAS/TOOLS/ue_sim_ci.conf