Blocked by #2326 See [design doc](https://docs.google.com/document/d/1FOmpGCiZAWTd6a3vcEHBnm1LKp7HAKuD4BBN3YCkymc/edit#heading=h.300wviciakra) for `DefaultMeasurementConsumer`. For this issue: - Implement the DefaultMeasurementConsumer as specified in the design doc. See also [prototype code](https://github.com/open-telemetry/opentelemetry-python/blob/33475592768827bcf48f4bc17bf703285dc17d6d/opentelemetry-sdk/src/opentelemetry/sdk/_metrics/_internal/measurement_processor.py#L89-L116) - With mocks, test that it passes calls onto MetricReaderStorage
Blocked by #2326
See design doc for
DefaultMeasurementConsumer. For this issue: