feat: Add custom SLI interval for ai-gateway's dashboard
Dashboard snapshot: https://dashboards.gitlab.net/dashboard/snapshot/86Z3QxJdTBAkbLWe5tiM5KptfZW7Kmsu
Remediation for gitlab-com/gl-infra/platform/runway/team#89 (closed)
Dashboard snapshot: https://dashboards.gitlab.net/dashboard/snapshot/86Z3QxJdTBAkbLWe5tiM5KptfZW7Kmsu
Remediation for gitlab-com/gl-infra/platform/runway/team#89 (closed)