feat: add new error reason types for missing origin and overloaded credentials
feat: add new TimeSeriesResourceHierarchyLevel for metric metadata
PiperOrigin-RevId: 689010571
feat: add `Publishing.rest_reference_documentation_uri` to aid client library publication
feat: add `ErrorReason.LOCATION_POLICY_VIOLATED` enum value
docs: minor tweaks to various comments
PiperOrigin-RevId: 613949885
feat: added field proto_reference_documentation_uri to proto reference documentation.
feat: added SERVICE_NOT_VISIBLE and GCP_SUSPENDED into error reason
PiperOrigin-RevId: 517437454