Emit Negative Outcomes: Denied Metrics

[jan-auer]

Emit metric stats and outcomes for metrics that are dropped as a result of the config.metrics.denied_names config in Project::filter_metrics

Acceptance Criteria

• Outcomes and metric stats should be emitted in a batched fashion wherever possible.
• Outcomes should use DataCategory::MetricBucket and Outcome::Filtered with reason code "denied_name".
• The volume metric stats (c:metric_stats/volume@none) should be emitted with the correct tagging and with OutcomeId::FILTERED.

Validation

• Organization stats show the number of "Filtered Metrics" after sending metrics that have a denied name.