Our [OpenTelemetry tutorial](https://docs.pixielabs.ai/tutorials/integrations/otel/) includes a single example for exporting `metric.Gauge` signal types. We should add `metric.Summary` and `metric.Span` examples.
Our OpenTelemetry tutorial includes a single example for exporting
metric.Gaugesignal types. We should addmetric.Summaryandmetric.Spanexamples.