disable gpgcheck for cvmfs eessi config (not provided upstream)

Author: bertiethorpe

environments/common/inventory/group_vars/all/dnf_repo_timestamps.yml

@@ -239,7 +239,9 @@ dnf_repos_default:
       pulp_path: eessi/rhel/8/noarch
       pulp_timestamp: 20251119T202303
       repo_file: cvmfs-config-eessi
+      gpgcheck: false
     '9':
       pulp_path: eessi/rhel/8/noarch
       pulp_timestamp: 20251119T202303
       repo_file: cvmfs-config-eessi
+      gpgcheck: false