Metric tags are being dropped when using ObserverType: summary

[jatan28]

Currently, the statsd receiver supports the conversion of timings to either gauge/summary. While using gauge we can see that the tags of the original incoming metric are correctly translated to output metric labels but this does not happen when using summary which is seen https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/receiver/statsdreceiver/protocol/metric_translator.go#L71

Steps to reproduce
Use config:

statsd:
    endpoint: 0.0.0.0:<port>
    aggregation_interval: 60s
    enable_metric_type: false
    timer_histogram_mapping:
    - statsd_type: histogram
      observer_type: summary
    - statsd_type: timing
      observer_type: summary

And send timing metrics with labels. 

[gavindoudou]

Thanks! The summary part does not have tags. I will add.

[gavindoudou]

Are working on a fix, will have the PR tomorrow.

[gavindoudou]

Fixed by that PR 3440.

[gavindoudou]

Cam we close that?

[jmacd]

Done.