fix(cosign): quote COSIGN_PRIVATE_KEY variable to prevent word splitting

mentioned in commit 0b6293c8

mentioned in merge request Orange-OpenSource/lfn/ci_cd/chained-ci-client-launcher!283 (merged)

mentioned in merge request Orange-OpenSource/lfn/ci_cd/chained-ci-py!455 (merged)

mentioned in merge request Orange-OpenSource/lfn/ci_cd/docker-ansible-core!296 (merged)

mentioned in merge request Orange-OpenSource/lfn/infra/infra_collection!246 (merged)

mentioned in merge request Orange-OpenSource/lfn/infra/kubernetes_collection!314 (merged)

mentioned in merge request Orange-OpenSource/lfn/infra/os_infra_manager_docker!380 (closed)

mentioned in merge request Orange-OpenSource/lfn/infra/rke2_automatic_installation_collection!334 (merged)

mentioned in merge request Orange-OpenSource/k8s-tz/tools/template-template!261 (merged)

mentioned in merge request vriska/searchdown!57

mentioned in merge request hobyte/kube-cli!34 (closed)

mentioned in merge request to-be-contained/images!59 (merged)

mentioned in merge request to-be-continuous/tools/gitlab-ci-test!8

mentioned in merge request Orange-OpenSource/k8s-tz/tools/template-template!267 (merged)

mentioned in merge request Orange-OpenSource/lfn/ci_cd/chained-ci-py!458 (merged)

mentioned in merge request Orange-OpenSource/lfn/ci_cd/docker-ansible-core!300 (merged)

mentioned in merge request Orange-OpenSource/lfn/infra/infra_collection!251 (merged)

mentioned in merge request Orange-OpenSource/lfn/infra/kubernetes_collection!321 (merged)

mentioned in merge request Orange-OpenSource/lfn/infra/rke2_automatic_installation_collection!341 (merged)

mentioned in merge request arachnidsGrip/searchdown!60

mentioned in merge request to-be-contained/images!70 (merged)

mentioned in merge request to-be-continuous/samples/node-on-openshift!41 (closed)

mentioned in merge request to-be-continuous/samples/freepascal-make-helm!59 (closed)

mentioned in merge request to-be-continuous/samples/golang-docker-on-aws!138 (closed)

mentioned in merge request to-be-continuous/samples/maven-on-kubernetes!156 (closed)

mentioned in merge request arachnidsGrip/searchdown!65 (merged)

mentioned in merge request Orange-OpenSource/lfn/infra/os_infra_manager_docker!384

mentioned in merge request to-be-continuous/samples/node-on-openshift!46

mentioned in merge request to-be-continuous/samples/freepascal-make-helm!60 (merged)

mentioned in merge request to-be-continuous/samples/golang-docker-on-aws!140 (merged)

mentioned in merge request to-be-continuous/samples/maven-on-kubernetes!161

mentioned in merge request hobyte/kube-cli!36

mentioned in merge request d3269/tbc-cicd-for-java!17 (merged)