fix(deps): update dependency uis/devops/continuous-delivery/ci-templates to v7.21.0

mentioned in merge request gcp-function!52 (merged)

mentioned in merge request ucam-faas-long!40 (merged)

mentioned in merge request gke-cluster!94

mentioned in merge request gcp-scheduled-script!64

mentioned in merge request gcp-notification-to-gitlab-issue!54 (merged)

mentioned in merge request gcp-monitoring!20 (merged)

mentioned in merge request ucam-faas!68 (merged)

mentioned in merge request gcp-container-image-mirror!55 (merged)

mentioned in merge request ucam-gcp-secret!26 (merged)

mentioned in merge request gcp-site-monitoring!66 (merged)

mentioned in merge request gcp-cloud-run-app!141 (merged)

mentioned in merge request gcp-secret-manager!53 (merged)

mentioned in merge request gcp-pubsub-to-ms-teams!51 (merged)

mentioned in merge request gcp-alert-snooze!57 (merged)

mentioned in merge request ucam-observe-remote-server!43

mentioned in merge request gcp-cloud-run-function!62