feat: add helm unittest to the helm template

mentioned in merge request gitlab-com/gl-infra/observability/tenant-observability/config-manager!261 (merged)

mentioned in merge request gitlab-com/gl-infra/gitlab-dedicated/library/terraform/resource-tagger!68 (merged)

mentioned in merge request asdf-gl-infra!108 (merged)

mentioned in merge request gitlab-com/gl-infra/gitlab-dedicated/library/asdf-gl-tenctl!11 (merged)

mentioned in merge request label-wrangler!97 (merged)

mentioned in merge request slackline!258 (merged)

mentioned in merge request gitlab-com/gl-infra/cells/http-router-deployer!108

mentioned in merge request asdf-promtool!91 (merged)

mentioned in merge request terra-transformer!633 (merged)

mentioned in merge request andreas.brandl/watertemp-exporter!35

mentioned in merge request common-ci-task-tests!288 (merged)

mentioned in merge request gitlab-com/gl-infra/gitlab-dedicated/library/ip-allowlist-deny-blackbox!214 (merged)

mentioned in merge request apps-script-scripts!12

mentioned in merge request gcp-quota-exporter!101

mentioned in merge request gitlab-com/gl-infra/platform/gitlab-issue-report-kit!65

mentioned in merge request truncated-tags!30 (merged)

mentioned in merge request semantic-release-merge-request-analyzer!32 (merged)

mentioned in merge request gitlab-com/gl-infra/gitlab-dedicated/library/dedicated-aws-exporter!79 (merged)

mentioned in merge request gitlab-com/gl-infra/platform/runway/example-service!318 (merged)

mentioned in merge request cmbr!398 (merged)

mentioned in merge request fforster/gitlab-mcp!91 (merged)

mentioned in merge request autolabels!61 (merged)

mentioned in merge request gitlab-com/gl-infra/gitlab-dedicated/library/byok-status-exporter!337 (merged)

mentioned in merge request ringctl!268 (merged)

mentioned in merge request common-ci-tasks-images!664 (merged)

mentioned in merge request gitlab-com/runbooks!9036 (merged)

mentioned in merge request gitlab-org/ruby/gems/labkit-ruby!160 (merged)

mentioned in merge request fluentd-docker!113 (merged)

mentioned in merge request transaction_watchdog!29 (merged)

mentioned in merge request common-ci-tasks!1060 (merged)

mentioned in merge request jsonnet-tool!232 (merged)

mentioned in merge request gitlab-com/gl-infra/k8s-mgmt/clusters!160 (merged)

mentioned in merge request gitlab-org/analytics-section/platform-insights/data-insights-platform-helm-charts!10 (merged)

mentioned in merge request fforster/epic-update!17 (merged)