Metrics

• Prometheus receiver can expect otel_scope_schema_url and otel_scope_[attribute] labels on all metrics.
  (#4505)
• Prometheus receiver no longer expects otel_scope_info metric.
  (#4505)
• Prometheus exporter adds otel_scope_schema_url and otel_scope_[attribute] labels on all metrics.
  (#4505)
• Prometheus exporter no longer exports otel_scope_info metric.
  (#4505)

Entities

• Define rules for setting identifying attributes.
  (#4498)
• Define rules for entity-resource referencing model.
  (#4499)

Common

• Move Instrumentation Scope definition from glossary to a dedicated document and use normative language.
  (#4488)