*Background & Motivation*
CDRIVER-4002 identified a scaling issue using a client pool across multiple threads. Regular performance monitoring should help prevent future regressions. https://github.com/10gen/performance-tooling-docs/blob/main/getting_started/performance_monitoring_setup.md#custom-alerts--monitoring includes information on setting up alerts.

*Scope*

• Add alerts for when performance differs significantly in metrics reported in the mongo-c-driver-perf Evergreen project.
• Consider starting with stable metrics, and filing tickets to stabilize other metrics. TestJsonMultiExport seems unstable.