After the major refactoring of Metrics SDK, we should update the Prometheus exporter to adopt the changes.

More details: https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/metrics/datamodel.md#prometheus-compatibility

This is dependent on

• Add InstrumentationInfo and Resource to the metrics data to be exported. #1299
• Implement Merge and Diff operation for Histogram Aggregation #1303