Memorystore Valkey for ops.gitlab.net Service

• Service Overview
• Alerts: https://alerts.gitlab.net/#/alerts?filter=%7Btype%3D%22memorystore-ops-gitlab-valkey%22%2C%20tier%3D%22db%22%7D
• Label: gitlab-com/gl-infra/production~“Service::MemorystoreOpsGitlabValkey”