Background

The WikiLambda API instrument is the only instrument that uses EventLogging::getMetricsPlatformClient() and the MetricsClient class. Migrating this instrument to use the Test Kitchen SDK will unblock the deprecation and removal of that method and class.

AC

• The instrument config is added to Test Kitchen UI
• The instrument is rewritten to use InstrumentManager#getInstrument()
  • https://gerrit.wikimedia.org/g/mediawiki/extensions/WikiLambda/+/1f98621e4fabbc3209a5c656fcfef6f075dbe786/includes/ActionAPI/WikiLambdaApiBase.php#578
• The stream config is updated to reflect management via Test Kitchen
  • https://gerrit.wikimedia.org/g/operations/mediawiki-config/+/4799083316924ee510febc57f238f8140c8ff7fb/wmf-config/ext-EventStreamConfig.php#3191
  • Remove producers.metrics_platform_client.provide_values property
  • Remove sample property
  • Add a link to the instrument config in Test Kitchen UI