https://cloud.google.com/logging/docs/alerting/log-based-alerts
feat: Added support for user-defined labels on cloud monitoring's Service and
ServiceLevelObjective objects
fix!: mark required fields in QueryTimeSeriesRequest as required
PiperOrigin-RevId: 393200011
feat: Added support for units in the MetricService
feat: Added total_size to the response of ListAlertPolicies.
fix: Un-deprecated cluster_istio for service monitoring.
feat: Added IstioCanonicalService for service monitoring.
feat: Added creation and mutation records to notification channels.
feat: Added support for querying metrics for folders and organizations.
fix: Extended the default deadline for UpdateGroup to 180s.
feat: Added support for secondary aggregation when querying metrics.
PiperOrigin-RevId: 364422694
