Gitlab::UsageDataCounters::HLLRedisCounter::UnknownEvent: Unknown event i_code_review_merge_request_widget_metrics_expand

https://sentry.gitlab.net/gitlab/gitlabcom/issues/3381944/?referrer=gitlab_plugin

Gitlab::UsageDataCounters::HLLRedisCounter::UnknownEvent: Unknown event i_code_review_merge_request_widget_metrics_expand