What did you do?

I was writing unit test in open-telemetry/opentelemetry-collector-contrib#38652 when I noticed that I get the native histogram exemplars from Prometheus scrape, even if native histograms ingestion is disabled.

Basically AppendExemplar call here

isHistogram && sl.enableNativeHistogramIngestion 

What did you expect to see?

Exemplars for native histograms ignored when native histogram ingestion is disabled.

What did you see instead? Under which circumstances?

AppendExemplar called.

System information

No response

Prometheus version

3.0 - 3.3

Prometheus configuration file

none

Alertmanager version

Alertmanager configuration file

Logs