azure_metrics datastrems are using rename processor to rename azure.metrics to azure.{datastream_name}
https://github.com/elastic/integrations/blob/main/packages/azure_metrics/data_stream/container_registry/elasticsearch/ingest_pipeline/default.yml#L7-L10

For container_instance is used azure.monitor field - https://github.com/elastic/integrations/blob/main/packages/azure_metrics/data_stream/container_instance/elasticsearch/ingest_pipeline/default.yml#L7-L10, that does not exist.

As result metrics are reported under azure.metrics, instead of under azure.container_instance - sample here

1. use alias for this fields if possible?
2. rename azure.monitor -> azure.metrics? (in this case remove azure.metrics field from the fields definition)

cc @zmoog @tommyers-elastic