cleaning up migration job before deploy

.gitlab-ci.yml

@@ -105,6 +105,7 @@ deploy:
   before_script:
     - kubectl config use-context open-source/metager-keymanager:gitlab-agent
   script: |
+    kubectl -n ${KUBERNETES_NAMESPACE delete job keymanager-migration-job
     helm -n ${KUBERNETES_NAMESPACE} upgrade --install ${HELM_RELEASE_NAME} chart/ \
       --set application.secretName=${HELM_RELEASE_NAME} \
       --set image.repository=${CI_REGISTRY_IMAGE}/${DOCKER_IMAGE_NAME} \