fix: envsubst when variable contains a '&'

mentioned in commit 482db124

mentioned in merge request Orange-OpenSource/lfn/ci_cd/chained-ci-client-launcher!84 (merged)

mentioned in merge request Orange-OpenSource/lfn/ci_cd/chained-ci-py!208 (merged)

mentioned in merge request Orange-OpenSource/lfn/infra/infra_collection!74 (merged)

mentioned in merge request Orange-OpenSource/lfn/infra/kubernetes_collection!120 (merged)

mentioned in merge request Orange-OpenSource/lfn/infra/os_infra_manager_docker!164 (merged)

mentioned in merge request Orange-OpenSource/lfn/infra/rke2_automatic_installation_collection!141 (merged)

mentioned in merge request Orange-OpenSource/lfn/opnfv/xtesting-api!190 (merged)

mentioned in merge request Deltamir/ansible-hashistack!138

mentioned in merge request Orange-OpenSource/lfn/ci_cd/chained-ci-client-launcher!85 (merged)

mentioned in merge request Orange-OpenSource/lfn/ci_cd/chained-ci-py!209 (merged)

mentioned in merge request to-be-continuous/tools/aws-auth-provider!17 (merged)

mentioned in merge request to-be-continuous/samples/python-helmfile-on-kubernetes!52 (merged)

mentioned in merge request to-be-continuous/samples/python-on-kubernetes!43 (merged)

mentioned in merge request to-be-continuous/samples/freepascal-make-helm!19 (merged)

mentioned in merge request to-be-continuous/tools/gcp-auth-provider!57 (merged)

mentioned in merge request to-be-continuous/samples/golang-docker-on-aws!72 (merged)

mentioned in merge request to-be-continuous/samples/php-on-kubernetes!97 (merged)

mentioned in merge request to-be-continuous/samples/maven-on-kubernetes!100 (merged)

mentioned in merge request to-be-continuous/tools/vault-secrets-provider!91 (merged)

mentioned in merge request to-be-continuous/tools/tracking!55 (merged)

mentioned in merge request Deltamir/ansible-hashistack!470