fix(deps): update dependency uis/devops/continuous-delivery/ci-templates to v7.28.4

mentioned in merge request ucam-minimal-gcp-monitoring!80

mentioned in merge request gcp-function!128

mentioned in merge request gke-cluster!147

mentioned in merge request gcp-alert-snooze!157

mentioned in merge request ucam-observe-remote-server!116

mentioned in merge request gcp-monitoring!82

mentioned in merge request ucam-gcp-secret!121

mentioned in merge request gcp-scheduled-script!132

mentioned in merge request gcp-container-image-mirror!121

mentioned in merge request gcp-site-monitoring!156

mentioned in merge request gcp-cloud-run-function!92

mentioned in merge request gcp-alert-to-gitlab-issue!62

mentioned in merge request ucam-faas!174

mentioned in merge request ucam-faas-long!121

mentioned in merge request gcp-cloud-run-app!169

mentioned in merge request gcp-secret-manager!129

mentioned in merge request gcp-notification-to-gitlab-issue!141

mentioned in merge request uis-traffic-manager-mtls!39

mentioned in merge request gcp-pubsub-to-ms-teams!156