[processor/metricstransform] Allow scaling exponential histograms

[TylerHelmuth]

Component(s)

metricstransformprocessor

Is your feature request related to a problem? Please describe.

To help normalize telemetry between old and stable http semantic conventions, I need to be able to convert the http.client.duration histogram I need to be able to scale from ms to seconds. The metrics transform processor can do this for histograms, but not exponential histograms.

Describe the solution you'd like

Update the processor so it can scale exponential histograms.

Describe alternatives you've considered

No response

Additional context

open-telemetry/semantic-conventions#534

[github-actions]

Pinging code owners:

• processor/metricstransform: @dmitryax

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[github-actions]

Pinging code owners for processor/metricstransform: @dmitryax. See Adding Labels via Comments if you do not have permissions to add labels yourself.

[TylerHelmuth]

pinging @jmacd @kentquirk @dashpole

[TylerHelmuth]

pinging @jpkrohling

[jpkrohling]

I pinged a few folks here at Grafana Labs who might be interested in the topic.

[aknuds1]

I will look into this when I'm back from PTO, i.e. Tuesday 6th of February.

[github-actions]

This issue has been inactive for 60 days. It will be closed in 60 days if there is no activity. To ping code owners by adding a component label, see Adding Labels via Comments, or if you are unsure of which component this issue relates to, please ping @open-telemetry/collector-contrib-triagers. If this issue is still relevant, please ping the code owners or leave a comment explaining why it is still relevant. Otherwise, please close it.

Pinging code owners:

• processor/metricstransform: @dmitryax

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[aknuds1]

Note to self: Look into this.