[exporter/debug] output buckets for exponential histograms

[andrzej-stencel]

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

The Debug exporter implements outputting metric data point as one-liners in #10462. This PR is missing bucket output for Exponential Histogram metric type: https://github.com/open-telemetry/opentelemetry-collector/pull/10462/files#diff-58cbcb7b06ddbcabde95075b54705aecfa51b6a57f3326795bccadaf0f50bde8R123.

Describe the solution you'd like

I would like this to be implemented. 🙂

It's not a terrible amount of work, but it needs to be correct, and I didn't want to withhold the metrics PR any longer.

[cswpy]

Hey @andrzej-stencel, I am a new contributor to the project and stumbled upon the topic of Native Histograms. I'd love to take a stab at it!

[andrzej-stencel]

That would be great! Assigning the issue to you @cswpy. 🚀