Remove legacy integration test refs and k8s deployment

Description

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

.gitlab/ci/legacy/.integration-test-containerlab.yml

-variables:
-    CLAB_TEMPLATE: "${CI_PROJECT_DIR}/controller/test/containerlab/int01.clab.tmpl.yml"
-    CLAB_DIR: "/home/gitlab-runner/clab"
-    CLAB_NAME: "clab${CI_PIPELINE_IID}"
-
-legacy-containerlab-deploy:
-    stage: test-legacy
-    tags:
-        - shell-containerlab
-    needs: ["build-controller-image", "build-controller-testing-image"]
-    script:
-        - firstOctet=$(python3 ${CI_PROJECT_DIR}/.gitlab/ci/scripts/generate_octet.py $CI_COMMIT_SHA)
-        - secondOctet=$(python3 ${CI_PROJECT_DIR}/.gitlab/ci/scripts/generate_octet.py $CI_PIPELINE_ID)
-        - export CLAB_MGMT_SUBNET="172.$firstOctet.$secondOctet.0/24"
-        - cd ${CLAB_DIR}
-        - ls -la
-        - |
-            sed -e "s|@@CEOS_CONTAINER_IMAGE@@|${CEOS_IMAGE}|g" \
-                -e "s|@@GOSDN_CONTAINER_IMAGE@@|${GOSDN_IMAGE}|g" \
-                -e "s|@@CLAB_NAME@@|${CLAB_NAME}|g" \
-                -e "s|@@CLAB_MGMT_SUBNET@@|${CLAB_MGMT_SUBNET}|g" \
-                ${CLAB_TEMPLATE} > ${CLAB_NAME}.clab.yml
-        - cat ${CLAB_NAME}.clab.yml
-        - echo "${DOCKER_AUTH_CONFIG}" > ~/.docker/config.json | docker login $CI_REGISTRY
-        - echo ${GOSDN_IMAGE}
-        - docker pull ${GOSDN_IMAGE}
-        - docker pull ${CEOS_IMAGE}
-        - sudo containerlab deploy --topo ${CLAB_DIR}/${CLAB_NAME}.clab.yml --reconfigure
-        - |
-            echo -e "\
-            GOSDN_HTTP_PORT=$(${CI_PROJECT_DIR}/.gitlab/ci/scripts/docker_host_port 8080 clab-${CLAB_NAME}-gosdn)\n\
-            GOSDN_GRPC_PORT=$(${CI_PROJECT_DIR}/.gitlab/ci/scripts/docker_host_port 55055 clab-${CLAB_NAME}-gosdn)\n\
-            CEOS1_PORT=$(${CI_PROJECT_DIR}/.gitlab/ci/scripts/docker_host_port 6030 clab-${CLAB_NAME}-ceos1)" \
-            > ${CI_PROJECT_DIR}/build.env
-        - cat ${CI_PROJECT_DIR}/build.env
-    artifacts:
-        reports:
-            dotenv: ${CI_PROJECT_DIR}/build.env
-
-
-legacy-containerlab-destroy:
-    stage: test-legacy
-    tags:
-        - shell-containerlab
-    needs:
-        [
-            "legacy-containerlab-deploy",
-            "legacy-integration-test-legacy:nucleus",
-            "legacy-integration-test-legacy:api"
-        ]
-    before_script:
-        - cd ${CLAB_DIR}
-    script:
-        - sudo containerlab destroy --topo ${CLAB_DIR}/${CLAB_NAME}.clab.yml -c
-        - docker volume rm -f ${CLAB_NAME}-volume
-        - echo ${CLAB_NAME}
-        - ls -la
-        - rm ${CLAB_DIR}/${CLAB_NAME}.clab.yml || true
-        - rm ${CLAB_DIR}/.${CLAB_NAME}.clab.yml.bak || true
-        - sudo rm -r ${CLAB_DIR}/clab-${CLAB_NAME} || true
-        - ls -la
-
-    allow_failure: true
-
-
-#containerlab:clean:
-#    stage: .post
-#    tags:
-#        - shell-containerlab
-#    before_script:
-#        - cd ${CLAB_DIR}
-#    script:
-#        - docker kill $(docker ps -q) || true
-#        - docker rm $(docker ps -a -q) || true
-#        - docker rmi $(docker images | grep 'registry.code.fbi.h-da.de/danet/gosdn ' | awk '{print $3}') || true
-#        - sudo rm -rf ${CLAB_DIR}/clab-* || true
-#        - sudo sed -i 's|.*clab.*||g' /etc/hosts
-#    allow_failure: true
-#    rules:
-#        - if: $CI_SCHEDULE_CLEAN
-#          when: always